5zpDdADY

1NOTE:
2Changelog as shipped with exim-4.91-1.el6.x86_64.rpm which seems to have been updated 10th june 2019
3no mention of cve-2019-10149
4-----------------------
5
6
7
8
9
10Change log file for Exim from version 4.21
11------------------------------------------
12This document describes *changes* to previous versions, that might
13affect Exim's operation, with an unchanged configuration file.  For new
14options, and new features, see the NewStuff file next to this ChangeLog.
15
16
17Exim version 4.91
18-----------------
19
20GF/01 DEFER rather than ERROR on redis cluster MOVED response.
21      When redis_servers is set to a list of > 1 element, and the Redis servers
22      in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
23      case of MOVED into a DEFER case instead, thus moving the query onto the
24      next server in the list. For a cluster of N elements, all N servers must
25      be defined in redis_servers.
26
27GF/02 Catch and remove uninitialized value warning in exiqsumm
28      Check for existence of @ARGV before looking at $ARGV[0]
29
30JH/01 Replace the store_release() internal interface with store_newblock(),
31      which internalises the check required to safely use the old one, plus
32      the allocate and data copy operations duplicated in both (!) of the
33      extant use locations.
34
35JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
36      modifier.  This matches the restriction on the commandline.
37
38JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
39      Previously only the last row was returned.
40
41JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
42      we assumed that tags in the header were well-formed, and parsed the
43      element content after inspecting only the first char of the tag.
44      Assumptions at that stage could crash the receive process on malformed
45      input.
46
47JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
48      While running the DKIM ACL we operate on the Permanent memory pool so that
49      variables created with "set" persist to the DATA ACL.  Also (at any time)
50      DNS lookups that fail create cache records using the Permanent pool.  But
51      expansions release any allocations made on the current pool - so a dnsdb
52      lookup expansion done in the DKIM ACL releases the memory used for the
53      DNS negative-cache, and bad things result.  Solution is to switch to the
54      Main pool for expansions.
55      While we're in that code, add checks on the DNS cache during store_reset,
56      active in the testsuite.
57      Problem spotted, and debugging aided, by Wolfgang Breyha.
58
59JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
60      When none of the hosts presented to a transport match an already-open
61      connection, close it and proceed with the list.  Previously we would
62      queue the message.  Spotted by Lena with Yahoo, probably involving
63      round-robin DNS.
64
65JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
66      Previously a spurious "250 OK id=" response was appended to the proper
67      failure response.
68
69JH/08 The "support for" informational output now, which built with Content
70      Scanning support, has a line for the malware scanner interfaces compiled
71      in.  Interface can be individually included or not at build time.
72
73JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
74      by the template makefile "src/EDITME".  The "STREAM" support for an older
75      ClamAV interface method is removed.
76
77JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
78      rows affected is given instead).
79
80JH/11 The runtime Berkeley DB library version is now additionally output by
81      "exim -d -bV".  Previously only the compile-time version was shown.
82
83JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
84      SMTP connection.  Previously, when one had more receipients than the
85      first, an abortive onward connection was made.  Move to full support for
86      multiple onward connections in sequence, handling cutthrough connection
87      for all multi-message initiating connections.
88
89JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
90      routers.  Previously, a multi-recipient message would fail to match the
91      onward-connection opened for the first recipient, and cause its closure.
92
93JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
94      a timeout on read on a GnuTLS initiating connection, resulting in the
95      initiating connection being dropped.  This mattered most when the callout
96      was marked defer_ok.  Fix to keep the two timeout-detection methods
97      separate.
98
99JH/15 Relax results from ACL control request to enable cutthrough, in
100      unsupported situations, from error to silently (except under debug)
101      ignoring.  This covers use with PRDR, frozen messages, queue-only and
102      fake-reject.
103
104HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
105
106JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
107      metadata, resulting in a crash in free().
108
109PP/01 Fix broken Heimdal GSSAPI authenticator integration.
110      Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
111      Broken also in d185889f4, with init system revamp.
112
113JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
114      Previously we abruptly closed the connection after reading a malware-
115      found indication; now we go on to read the "scan ok" response line,
116      and send a quit.
117
118JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
119      ACL.  Previously, a crash would result.
120
121JH/19 Speed up macro lookups during configuration file read, by skipping non-
122      macro text after a replacement (previously it was only once per line) and
123      by skipping builtin macros when searching for an uppercase lead character.
124
125JH/20 DANE support moved from Experimental to mainline.  The Makefile control
126      for the build is renamed.
127
128JH/21 Fix memory leak during multi-message connections using STARTTLS.  A buffer
129      was allocated for every new TLS startup, meaning one per message.  Fix
130      by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
131
132JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
133      reported the original.  Fix to report (as far as possible) the ACL
134      result replacing the original.
135
136JH/23 Fix memory leak during multi-message connections using STARTTLS under
137      OpenSSL.  Certificate information is loaded for every new TLS startup,
138      and the resources needed to be freed.
139
140JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
141
142JH/25 Fix utf8_downconvert propagation through a redirect router.  Previously it
143      was not propagated.
144
145JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
146      DATA response info to the (existing) per-recipient response info for
147      the "C=" log element.  It can have useful tracking info from the
148      destination system.  Patch from Simon Arlott.
149
150JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
151      length value.  Previously this would segfault.
152
153HS/02 Support Avast multiline protoocol, this allows passing flags to
154      newer versions of the scanner.
155
156JH/28 Ensure that variables possibly set during message acceptance are marked
157      dead before release of memory in the daemon loop.  This stops complaints
158      about them when the debug_store option is enabled.  Discovered specifically
159      for sender_rate_period, but applies to a whole set of variables.
160      Do the same for the queue-runner and queue-list loops, for variables set
161      from spool message files.  Do the same for the SMTP per-message loop, for
162      certain variables indirectly set in ACL operations.
163
164JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
165      as a multi-recipient message from a mailinglist manager).  The coding had
166      an arbitrary cutoff number of characters while checking for more input;
167      enforced by writing a NUL into the buffer.  This corrupted long / fast
168      input.   The problem was exposed more widely when more pipelineing of SMTP
169      responses was introduced, and one Exim system was feeding another.
170      The symptom is log complaints of SMTP syntax error (NUL chars) on the
171      receiving system, and refused recipients seen by the sending system
172      (propating to people being dropped from mailing lists).
173      Discovered and pinpointed by David Carter.
174
175JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
176      replaced by the ${authresults } expansion.
177
178JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
179
180HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
181      allows proper process termination in container environments.
182
183JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
184      Previously the "final dot" had a newline after it; ensure it is CR,LF.
185
186JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
187      and "err_perm", deprecated since 4.83 when the RFC-defined words
188      "temperror" and "permerror" were introduced.
189
190JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
191      transport-filters or DKIM-signing.  The restriction was lost in the
192      consolidation of verify-callout and delivery SMTP handling.
193      Extend the restriction to also cover ARC-signing.
194
195JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
196      in defer=pass mode supply a 450 to the initiator.  Previously the message
197      would be spooled.
198
199PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
200      tls_require_ciphers is used as before.
201
202HS/03 Malware Avast: Better match the Avast multiline protocol. Add
203      "pass_unscanned".  Only tmpfails from the scanner are written to
204      the paniclog, as they may require admin intervention (permission
205      denied, license issues). Other scanner errors (like decompression
206      bombs) do not cause a paniclog entry.
207
208JH/36 Fix reinitialisation of DKIM logging variable between messages.
209      Previously it was possible to log spurious information in receive log
210      lines.
211
212JH/37 Bug 2255: Revert the disable of the OpenSSL session caching.  This
213      triggered odd behaviour from Outlook Express clients.
214
215PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
216      suffix list.
217
218JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
219      since the IETF WG has not yet settled on that versus the original
220      "bare" representation.
221
222JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
223      Previously the millisecond value corrupted the output.
224      Fix also for syslog_pid=no and log_selector +pid, for which the pid
225      corrupted the output.
226
227
228Exim version 4.90
229-----------------
230
231JH/01 Rework error string handling in TLS interface so that the caller in
232      more cases is responsible for logging.  This permits library-sourced
233      string to be attached to addresses during delivery, and collapses
234      pairs of long lines into single ones.
235
236PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
237      during configuration.  Wildcards are allowed and expanded.
238
239JH/02 Rework error string handling in DKIM to pass more info back to callers.
240      This permits better logging.
241
242JH/03 Rework the transport continued-connection mechanism: when TLS is active,
243      do not close it down and have the child transport start it up again on
244      the passed-on TCP connection.  Instead, proxy the child (and any
245      subsequent ones) for TLS via a unix-domain socket channel.  Logging is
246      affected: the continued delivery log lines do not have any DNSSEC, TLS
247      Certificate or OCSP information.  TLS cipher information is still logged.
248
249JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
250      identical IP addresses on different listening ports.  Will also affect
251      "exiwhat" output.
252
253PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
254      add noisy ifdef guards to special-case this sillyness.
255      Patch from Bernd Kuhls.
256
257JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
258      than 255 are no longer allowed.
259
260JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
261      Disable the session-cache too, which might reduce our load.  Since we
262      currrectly use a new context for every connection, both as server and
263      client, there is no benefit for these.
264      GnuTLS appears to not support tickets server-side by default (we don't
265      call gnutls_session_ticket_enable_server()) but client side is enabled
266      by default on recent versions (3.1.3 +) unless the PFS priority string
267      is used (3.2.4 +).
268
269PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
270      <https://reproducible-builds.org/specs/source-date-epoch/>.
271
272JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
273      the check for any unsuccessful recipients did not notice the limit, and
274      erroneously found still-pending ones.
275
276JH/08 Pipeline CHUNKING command and data together, on kernels that support
277      MSG_MORE.  Only in-clear (not on TLS connections).
278
279JH/09 Avoid using a temporary file during transport using dkim.  Unless a
280      transport-filter is involved we can buffer the headers in memory for
281      creating the signature, and read the spool data file once for the
282      signature and again for transmission.
283
284JH/10 Enable use of sendfile in Linux builds as default.  It was disabled in
285      4.77 as the kernel support then wasn't solid, having issues in 64bit
286      mode.  Now, it's been long enough.  Add support for FreeBSD also.
287
288JH/11 Bug 2104: Fix continued use of a transport connection with TLS.  In the
289      case where the routing stage had gathered several addresses to send to
290      a host before calling the transport for the first, we previously failed
291      to close down TLS in the old transport process before passing the TCP
292      connection to the new process.  The new one sent a STARTTLS command
293      which naturally failed, giving a failed delivery and bloating the retry
294      database.  Investigation and fix prototype from Wolfgang Breyha.
295
296JH/12 Fix check on SMTP command input synchronisation.  Previously there were
297      false-negatives in the check that the sender had not preempted a response
298      or prompt from Exim (running as a server), due to that code's lack of
299      awareness of the SMTP input buffering.
300
301PP/04 Add commandline_checks_require_admin option.
302      Exim drops privileges sanely, various checks such as -be aren't a
303      security problem, as long as you trust local users with access to their
304      own account.  When invoked by services which pass untrusted data to
305      Exim, this might be an issue.  Set this option in main configuration
306      AND make fixes to the calling application, such as using `--` to stop
307      processing options.
308
309JH/13 Do pipelining under TLS.  Previously, although safe, no advantage was
310      taken.  Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
311      responses to those, into a single TLS record each way (this usually means
312      a single packet).  As a side issue, smtp_enforce_sync now works on TLS
313      connections.
314
315PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes.  This
316      affects you only if you're dancing at the edge of the param size limits.
317      If you are, and this message makes sense to you, then: raise the
318      configured limit or use OpenSSL 1.1.  Nothing we can do for older
319      versions.
320
321JH/14 For the "sock" variant of the malware scanner interface, accept an empty
322      cmdline element to get the documented default one.  Previously it was
323      inaccessible.
324
325JH/15 Fix a crash in the smtp transport caused when two hosts in succession
326      are unsuable for non-message-specific reasons - eg. connection timeout,
327      banner-time rejection.
328
329JH/16 Fix logging of delivery remote port, when specified by router, under
330      callout/hold.
331
332PP/06 Repair manualroute's ability to take options in any order, even if one
333      is the name of a transport.
334      Fixes bug 2140.
335
336HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
337
338JH/17 Change the list-building routines interface to use the expanding-string
339      triplet model, for better allocation and copying behaviour.
340
341JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
342      Previously it was constructed the first time a possibly-matching string
343      was met in the configuration file input during startup; now it is done
344      during compilation.
345
346JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
347      compatible one, to avoid the (poorly documented) possibility of a config
348      file in the working directory redirecting the DB files, possibly correpting
349      some existing file.  CVE-2017-10140 assigned for BDB.
350
351JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
352      cache-hot.  Previously, although the result was properly cached, the
353      initial verify call returned a defer.
354
355JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
356      the main verify for receipient in uncached-mode.
357
358JH/22 Retire historical build files to an "unsupported" subdir.  These are
359      defined as "ones for which we have no current evidence of testing".
360
361JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
362      if present.  Previously it was ignored.
363
364JH/24 Start using specified-initialisers in C structure init coding.  This is
365      a C99 feature (it's 2017, so now considered safe).
366
367JH/25 Use one-bit bitfields for flags in the "addr" data structure.  Previously
368      if was a fixed-sized field and bitmask ops via macros; it is now more
369      extensible.
370
371PP/07 GitHub PR 56: Apply MariaDB build fix.
372      Patch provided by Jaroslav Škarvada.
373
374PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
375      during Coverity cleanups [4.87 JH/47]
376      Diagnosis and fix provided by Michael Fischer v. Mollard.
377
378JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
379      the right size to place the terminating semicolon on its own folded
380      line, the header hash was calculated to an incorrect value thanks to
381      the (relaxed) space the fold became.
382
383HS/02 Fix Bug 2130: large writes from the transport subprocess where chunked
384      and confused the parent.
385
386JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
387      which could crash as a result.  This could lead to undeliverable messages.
388
389JH/28 Logging: "next input sent too soon" now shows where input was truncated
390      for log purposes.
391
392JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID.  This
393      matters on fast-turnover and PID-randomising systems, which were getting
394      out-of-order delivery.
395
396JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
397      a possibly-overlapping copy.  The symptom was that "Remote host closed
398      connection in response to HELO" was logged instead of the actual 4xx
399      error for the HELO.
400
401JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
402      Previously only that bufferd was discarded, resulting in SYMTP command
403      desynchronisation.
404
405JH/32 DKIM: when a message has multiple signatures matching an identity given
406      in dkim_verify_signers, run the dkim acl once for each.  Previously only
407      one run was done.  Bug 2189.
408
409JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
410      "panic the current process" to "deliberately defer".  The panic log is
411      still written with the problem list name; the mail and reject logs now
412      get a temp-reject line for the message that was being handled, saying
413      something like "domains check lookup or other defer".  The SMTP 451
414      message is still "Temporary local problem".
415
416JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
417      A crafted sequence of BDAT commands could result in in-use memory beeing
418      freed.  CVE-2017-16943.
419
420HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
421      from SMTP input.  Previously it was always done; now only done for DATA
422      and not BDAT commands.  CVE-2017-16944.
423
424JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
425      to the message (such as an overlong header line).  Previously this was
426      not done and we did not exit BDAT mode.  Followon from the previous item
427      though a different problem.
428
429
430Exim version 4.89
431-----------------
432
433JH/01 Bug 1922: Support IDNA2008.  This has slightly different conversion rules
434      than -2003 did; needs libidn2 in addition to libidn.
435
436JH/02 The path option on a pipe transport is now expanded before use.
437
438PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
439      Patch provided by "Björn", documentation fix added too.
440
441JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
442      missing a wire-to-host endian conversion.
443
444JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode.  Chunk data following
445      close after a BDAT command line could be taken as a following command,
446      giving a synch failure.  Fix by only checking for synch immediately
447      before acknowledging the chunk.
448
449PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
450      no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
451      macro.  Patches provided by Josh Soref.
452
453JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
454      Previously we did not; the RFC seems ambiguous and VRFY is not listed
455      by IANA as a service extension.  However, John Klensin suggests that we
456      should.
457
458JH/06 Bug 2017: Fix DKIM verification in -bh test mode.  The data feed into
459      the dkim code may be unix-mode line endings rather than smtp wire-format
460      CRLF, so prepend a CR to any bare LF.
461
462JH/07 Rationalise the coding for callout smtp conversations and transport ones.
463      As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
464
465JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING.  Any BDAT commands after
466      the first were themselves being wrongly included in the feed into dkim
467      processing; with most chunk sizes in use this resulted in an incorrect
468      body hash calculated value.
469
470JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
471      DKIM signature block, for verification.  Although advised against by
472      standards it is specifically not ruled illegal.
473
474JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
475
476JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
477      missing a body hash (the bh= tag).
478
479JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
480      It seems that HAProxy sends the Proxy Protocol information in clear and
481      only then does a TLS startup, so do the same.
482
483JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
484      TCP connections (such as for Spamd) unless the daemon successfully set
485      Fast Open mode on its listening sockets.  This fixes breakage seen on
486      too-old kernels or those not configured for Fast Open, at the cost of
487      requiring both directions being enabled for TFO, and TFO never being used
488      by non-daemon-related Exim processes.
489
490JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
491      endings, at least on the first header line.  Try to canonify any that get
492      past that check, despite the cost.
493
494JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
495      now limited to an arbitrary five deep, while parsing addresses with the
496      strip_excess_angle_brackets option enabled.
497
498PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
499      instead leave the unprompted TLS handshake in socket buffer for the
500      TLS library to consume.
501
502PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
503
504PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
505
506JH/16 Drop variables when they go out of scope.  Memory management drops a whole
507      region in one operation, for speed, and this leaves assigned pointers
508      dangling.  Add checks run only under the testsuite which checks all
509      variables at a store-reset and panics on a dangling pointer; add code
510      explicitly nulling out all the variables discovered.  Fixes one known
511      bug: a transport crash, where a dangling pointer for $sending_ip_address
512      originally assigned in a verify callout, is re-used.
513
514PP/06 Drop '.' from @INC in various Perl scripts.
515
516PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
517
518PP/08 Reduce a number of compilation warnings under clang; building with
519      CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
520      should be warning-free.
521
522JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
523
524HS/01 Fix portability problems introduced by PP/08 for platforms where
525      realloc(NULL) is not equivalent to malloc() [SunOS et al].
526
527HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
528      chunk. This allows us to accept broken chunked messages. We need a more
529      general solution here.
530
531PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
532      already-broken messages in the queue.
533
534JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce }  $value.
535
536JH/19 Fix reference counting bug in routing-generated-address tracking.
537
538
539Exim version 4.88
540-----------------
541
542JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
543      supports it and a size is available (ie. the sending peer gave us one).
544
545JH/02 The obsolete acl condition "demime" is removed (finally, after ten
546      years of being deprecated). The replacements are the ACLs
547      acl_smtp_mime and acl_not_smtp_mime.
548
549JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
550      a downgraded non-dane trust-anchor for the TLS connection (CA-style)
551      or even an in-clear connection were permitted.  Now, if the host lookup
552      was dnssec and dane was requested then the host is only used if the
553      TLSA lookup succeeds and is dnssec.  Further hosts (eg. lower priority
554      MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
555      if one fails this test.
556      This means that a poorly-configured remote DNS will make it incommunicado;
557      but it protects against a DNS-interception attack on it.
558
559JH/04 Bug 1810: make continued-use of an open smtp transport connection
560      non-noisy when a race steals the message being considered.
561
562JH/05 If main configuration option tls_certificate is unset, generate a
563      self-signed certificate for inbound TLS connections.
564
565JH/06 Bug 165: hide more cases of password exposure - this time in expansions
566      in rewrites and routers.
567
568JH/07 Retire gnutls_require_mac et.al.  These were nonfunctional since 4.80
569      and logged a warning sing 4.83; now they are a configuration file error.
570
571JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
572      (lacking @domain).  Apply the same qualification processing as RCPT.
573
574JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
575
576JH/10 Support ${sha256:} applied to a string (as well as the previous
577      certificate).
578
579JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
580      a cutthrough deliver is pending, as we always want to make a connection.
581      This also avoids re-routing the message when later placing the cutthrough
582      connection after a verify cache hit.
583      Do not update it with the verify result either.
584
585JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
586      when routing results in more than one destination address.
587
588JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
589      signing (which inhibits the cutthrough capability).  Previously only
590      the presence of an option was tested; now an expansion evaluating as
591      empty is permissible (obviously it should depend only on data available
592      when the cutthrough connection is made).
593
594JH/14 Fix logging of errors under PIPELINING.  Previously the log line giving
595      the relevant preceding SMTP command did not note the pipelining mode.
596
597JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
598      Previously they were not counted.
599
600JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
601      as one having no matching records.  Previously we deferred the message
602      that needed the lookup.
603
604JH/17 Fakereject: previously logged as a normal message arrival "<="; now
605      distinguished as "(=".
606
607JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
608      for missing MX records.  Previously it only worked for missing A records.
609
610JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
611
612JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
613      after the data-go-ahead and data-ack.  Patch from Jason Betts.
614
615JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
616      even for a "none" policy.  Patch from Tony Meyer.
617
618JH/22 Fix continued use of a connection for further deliveries. If a port was
619      specified by a router, it must also match for the delivery to be
620      compatible.
621
622JH/23 Bug 1874: fix continued use of a connection for further deliveries.
623      When one of the recipients of a message was unsuitable for the connection
624      (has no matching addresses), we lost track of needing to mark it
625      deferred.  As a result mail would be lost.
626
627JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
628
629JH/25 Decoding ACL controls is now done using a binary search; the source code
630      takes up less space and should be simpler to maintain.  Merge the ACL
631      condition decode tables also, with similar effect.
632
633JH/26 Fix problem with one_time used on a redirect router which returned the
634      parent address unchanged.  A retry would see the parent address marked as
635      delivered, so not attempt the (identical) child.  As a result mail would
636      be lost.
637
638JH/27 Fix a possible security hole, wherein a process operating with the Exim
639      UID can gain a root shell.  Credit to http://www.halfdog.net/ for
640      discovery and writeup.  Ubuntu bug 1580454; no bug raised against Exim
641      itself :(
642
643JH/28 Enable {spool,log} filesystem space and inode checks as default.
644      Main config options check_{log,spool}_{inodes,space} are now
645      100 inodes, 10MB unless set otherwise in the configuration.
646
647JH/29 Fix the connection_reject log selector to apply to the connect ACL.
648      Previously it only applied to the main-section connection policy
649      options.
650
651JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
652
653PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
654      by me.  Added RFC7919 DH primes as an alternative.
655
656PP/02 Unbreak build via pkg-config with new hash support when crypto headers
657      are not in the system include path.
658
659JH/31 Fix longstanding bug with aborted TLS server connection handling.  Under
660      GnuTLS, when a session startup failed (eg because the client disconnected)
661      Exim did stdio operations after fclose.  This was exposed by a recent
662      change which nulled out the file handle after the fclose.
663
664JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
665      signed directly by the cert-signing cert, rather than an intermediate
666      OCSP-signing cert.  This is the model used by LetsEncrypt.
667
668JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
669
670HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
671      an incoming connection.
672
673HS/02 Bug 1802: Do not half-close the connection after sending a request
674      to rspamd.
675
676HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
677      fallback to "prime256v1".
678
679JH/34 SECURITY: Use proper copy of DATA command in error message.
680      Could leak key material.  Remotely exploitable.  CVE-2016-9963.
681
682
683Exim version 4.87
684-----------------
685
686JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
687      and 3.4.4 - once the server is enabled to respond to an OCSP request
688      it does even when not requested, resulting in a stapling non-aware
689      client dropping the TLS connection.
690
691TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
692      support variable-length bit vectors. No functional change.
693
694TF/02 Improve the consistency of logging incoming and outgoing interfaces.
695      The I= interface field on outgoing lines is now after the H= remote
696      host field, same as incoming lines. There is a separate
697      outgoing_interface log selector which allows you to disable the
698      outgoing I= field.
699
700JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
701      If not running log_selector +smtp_connection the mainlog would be held
702      open indefinitely after a "too many connections" event, including to a
703      deleted file after a log rotate. Leave the per net connection logging
704      leaving it open for efficiency as that will be quickly detected by the
705      check on the next write.
706
707HS/01 Bug 1671: Fix post transport crash.
708      Processing the wait-<transport> messages could crash the delivery
709      process if the message IDs didn't exist for some reason. When
710      using 'split_spool_directory=yes' the construction of the spool
711      file name failed already, exposing the same netto behaviour.
712
713JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
714      mime_regex ACL conditions.
715
716JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
717      to DSN fail messages (bounces): remote IP, remote greeting, remote response
718      to HELO, local diagnostic string.
719
720JH/05 Downgrade message for a TLS-certificate-based authentication fail from
721      log line to debug.  Even when configured with a tls authenticator many
722      client connections are expected to not authenticate in this way, so
723      an authenticate fail is not an error.
724
725HS/02 Add the Exim version string to the process info.  This way exiwhat
726      gives some more detail about the running daemon.
727
728JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value.  This may
729      matter for fast-change records such as DNSBLs.
730
731JH/07 Bug 1678: Always record an interface option value, if set,  as part of a
732      retry record, even if constant.  There may be multiple transports with
733      different interface settings and the retry behaviour needs to be kept
734      distinct.
735
736JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
737
738JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
739
740JH/10 Bug 840: fix log_defer_output option of pipe transport
741
742JH/11 Bug 830: use same host for all RCPTS of a message, even under
743      hosts_randomize.  This matters a lot when combined with mua_wrapper.
744
745JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
746      ${quote_pgsql:<string>} operator.
747
748JH/13 Bug 1708: avoid misaligned access in cached lookup.
749
750JH/14 Change header file name for freeradius-client.  Relevant if compiling
751      with Radius support; from the Gentoo tree and checked under Fedora.
752
753JH/15 Bug 1712: Introduce $prdr_requested flag variable
754
755JH/16 Bug 1714: Permit an empty string as expansion result for transport
756      option transport_filter, meaning no filtering.
757
758JH/17 Bug 1713: Fix non-PDKIM_DEBUG build.  Patch from Jasen Betts.
759
760JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
761      defaults to "*" (all hosts).  The variable is now available when not built
762      with TLS, default unset, mainly to enable keeping the testsuite sane.
763      If a server certificate is not supplied (via tls_certificate) an error is
764      logged, and clients will find TLS connections fail on startup.  Presumably
765      they will retry in-clear.
766      Packagers of Exim are strongly encouraged to create a server certificate
767      at installation time.
768
769HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
770      with the $config_file variable.
771
772JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
773      in transport context, after the attempt, and per-recipient. The latter type
774      is per host attempted.  The event data is the error message, and the errno
775      information encodes the lookup type (A vs. MX) used for the (first) host,
776      and the trailing two digits of the smtp 4xx response.
777
778GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
779      to write to mainlog (or rejectlog, paniclog) in the window between file
780      creation and permissions/ownership being changed. Particularly affects
781      installations where exicyclog is run as root, rather than exim user;
782      result is that the running daemon panics and dies.
783
784JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
785
786JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
787      selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
788      "pri" and "weight".  Note that the previous implicit priority given by the
789      list order is no longer honoured.
790
791JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
792      for DKIM processing.
793
794JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
795      by defining SUPPORT_SOCKS.
796
797JH/26 Move PROXY support from Experimental to mainline, enabled for a build
798      by defining SUPPORT_PROXY.  Note that the proxy_required_hosts option
799      is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
800      variables are renamed to proxy_{local,external}_{address,port}.
801
802JH/27 Move Internationalisation support from Experimental to mainline, enabled
803      for a build by defining SUPPORT_I18N
804
805JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
806      of the query string, and make ${quote_redis:} do that quoting.
807
808JH/29 Move Events support from Experimental to mainline, enabled by default
809      and removable for a build by defining DISABLE_EVENT.
810
811JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
812
813JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
814      cached by the daemon.
815
816JH/32 Move Redis support from Experimental to mainline, enabled for a build
817      by defining LOOKUP_REDIS. The libhiredis library is required.
818
819JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
820      keys are given for lookup.
821
822JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
823      support, by using OpenSSL or GnuTLS library ones.  This means DKIM is
824      only supported when built with TLS support.  The PolarSSL SHA routines
825      are still used when the TLS library is too old for convenient support.
826
827JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
828      openssl_options), for security.  OpenSSL forces this from version 1.1.0
829      server-side so match that on older versions.
830
831JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
832      allocation for $value could be released as the expansion processing
833      concluded, but leaving the global pointer active for it.
834
835JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
836      and to use the domains and local_parts ACL conditions.
837
838JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
839      incorrectly not doubled on cutthrough transmission, hence seen as a
840      body-termination at the receiving system - resulting in truncated mails.
841      Commonly the sender saw a TCP-level error, and retransmitted the message
842      via the normal store-and-forward channel. This could result in duplicates
843      received - but deduplicating mailstores were liable to retain only the
844      initial truncated version.
845
846JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
847
848JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
849
850JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up.  While
851      we're in there, support oversigning also; bug 1309.
852
853JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
854
855HS/04 Add support for keep_environment and add_environment options.
856
857JH/43 Tidy coding issues detected by gcc --fsanitize=undefined.  Some remain;
858      either intentional arithmetic overflow during PRNG, or testing config-
859      induced overflows.
860
861JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
862      delivery resulted in actual delivery.  Cancel cutthrough before DATA
863      stage.
864
865JH/45 Fix cutthrough, when connection not opened by verify and target hard-
866      rejects a recipient: pass the reject to the originator.
867
868JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
869      Many were false-positives and ignorable, but it's worth fixing the
870      former class.
871
872JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
873      for the new environment-manipulation done at startup.  Move the routines
874      from being local to tls.c to being global via the os.c file.
875
876JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
877      an extract embedded as result-arg for a map, the first arg for extract
878      is unavailable so we cannot tell if this is a numbered or keyed
879      extraction.  Accept either.
880
881
882Exim version 4.86
883-----------------
884
885JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
886      expanded.
887
888JH/02 The smtp transport option "multi_domain" is now expanded.
889
890JH/03 The smtp transport now requests PRDR by default, if the server offers
891      it.
892
893JH/04 Certificate name checking on server certificates, when exim is a client,
894      is now done by default.  The transport option tls_verify_cert_hostnames
895      can be used to disable this per-host.  The build option
896      EXPERIMENTAL_CERTNAMES is withdrawn.
897
898JH/05 The value of the tls_verify_certificates smtp transport and main options
899      default to the word "system" to access the system default CA bundle.
900      For GnuTLS, only version 3.0.20 or later.
901
902JH/06 Verification of the server certificate for a TLS connection is now tried
903      (but not required) by default.  The verification status is now logged by
904      default, for both outbound TLS and client-certificate supplying inbound
905      TLS connections
906
907JH/07 Changed the default rfc1413 lookup settings to disable calls.  Few
908      sites use this now.
909
910JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
911      Status Notification (bounce) messages are now MIME format per RFC 3464.
912      Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
913      under the control of the dsn_advertise_hosts option, and routers may
914      have a dsn_lasthop option.
915
916JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
917      default, modifiable by a malware= option.  The list separator for
918      the options can now be changed in the usual way.  Bug 68.
919
920JH/10 The smtp_receive_timeout main option is now expanded before use.
921
922JH/11 The incoming_interface log option now also enables logging of the
923      local interface on delivery outgoing connections.
924
925JH/12 The cutthrough-routing facility now supports multi-recipient mails,
926      if the interface and destination host and port all match.
927
928JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
929      /defer_ok option.
930
931JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
932      Patch from Andrew Lewis.
933
934JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
935      now supports optional time-restrictions, weighting, and priority
936      modifiers per server.  Patch originally by <rommer@active.by>.
937
938JH/16 The spamd_address main option now supports a mixed list of local
939      and remote servers.  Remote servers can be IPv6 addresses, and
940      specify a port-range.
941
942JH/17 Bug 68: The spamd_address main option now supports an optional
943      timeout value per server.
944
945JH/18 Bug 1581: Router and transport options headers_add/remove can
946      now have the list separator specified.
947
948JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
949      option values.
950
951JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
952      under OpenSSL.
953
954JH/21 Support for the A6 type of dns record is withdrawn.
955
956JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
957      rather than the verbs used.
958
959JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
960      from 255 to 1024 chars.
961
962JH/24 Verification callouts now attempt to use TLS by default.
963
964HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
965      are generic router options now. The defaults didn't change.
966
967JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
968      Original patch from Alexander Shikoff, worked over by JH.
969
970HS/02 Bug 1575: exigrep falls back to autodetection of compressed
971      files if ZCAT_COMMAND is not executable.
972
973JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
974
975JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
976
977JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
978      Normally benign, it bites when the pair was led to by a CNAME;
979      modern usage is to not canonicalize the domain to a CNAME target
980      (and we were inconsistent anyway for A-only vs AAAA+A).
981
982JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
983
984JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
985      when evaluating $sender_host_dnssec.
986
987JH/31 Check the HELO verification lookup for DNSSEC, adding new
988      $sender_helo_dnssec variable.
989
990JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
991
992JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
993
994JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
995
996JH/35 Bug 1642: Fix support of $spam_ variables at delivery time.  Was
997      documented as working, but never had.  Support all but $spam_report.
998
999JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1000      added for tls authenticator.
1001
1002HS/03 Add perl_taintmode main config option
1003
1004
1005Exim version 4.85
1006-----------------
1007
1008TL/01 When running the test suite, the README says that variables such as
1009      no_msglog_check are global and can be placed anywhere in a specific
1010      test's script, however it was observed that placement needed to be near
1011      the beginning for it to behave that way. Changed the runtest perl
1012      script to read through the entire script once to detect and set these
1013      variables, reset to the beginning of the script, and then run through
1014      the script parsing/test process like normal.
1015
1016TL/02 The BSD's have an arc4random API. One of the functions to induce
1017      adding randomness was arc4random_stir(), but it has been removed in
1018      OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1019      function when detected.
1020
1021JH/01 Expand the EXPERIMENTAL_TPDA feature.  Several different events now
1022      cause callback expansion.
1023
1024TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1025      syntax errors in an expansion can be treated as a string instead of
1026      logging or causing an error, due to the internal use of bool_lax
1027      instead of bool when processing it.
1028
1029JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1030      server certificates when making smtp deliveries.
1031
1032JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1033
1034JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1035
1036TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1037
1038TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1039      Merged patch from Sebastian Wiedenroth.
1040
1041JH/05 Fix results-pipe from transport process.  Several recipients, combined
1042      with certificate use, exposed issues where response data items split
1043      over buffer boundaries were not parsed properly.  This eventually
1044      resulted in duplicates being sent.  This issue only became common enough
1045      to notice due to the introduction of connection certificate information,
1046      the item size being so much larger.  Found and fixed by Wolfgang Breyha.
1047
1048JH/06 Bug 1533: Fix truncation of items in headers_remove lists.  A fixed
1049      size buffer was used, resulting in syntax errors when an expansion
1050      exceeded it.
1051
1052JH/07 Add support for directories of certificates when compiled with a GnuTLS
1053      version 3.3.6 or later.
1054
1055JH/08 Rename the TPDA experimental facility to Event Actions.  The #ifdef
1056      is EXPERIMENTAL_EVENT, the main-configuration and transport options
1057      both become "event_action", the variables become $event_name, $event_data
1058      and $event_defer_errno.  There is a new variable $verify_mode, usable in
1059      routers, transports and related events.  The tls:cert event is now also
1060      raised for inbound connections, if the main configuration event_action
1061      option is defined.
1062
1063TL/06 In test suite, disable OCSP for old versions of openssl which contained
1064      early OCSP support, but no stapling (appears to be less than 1.0.0).
1065
1066JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1067      server certificate names available under the smtp transport option
1068      "tls_verify_cert_hostname" now do not permit multi-component wildcard
1069      matches.
1070
1071JH/10 Time-related extraction expansions from certificates now use the main
1072      option "timezone" setting for output formatting, and are consistent
1073      between OpenSSL and GnuTLS compilations.  Bug 1541.
1074
1075JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1076      encoded parameter in the incoming message.  Bug 1558.
1077
1078JH/12 Bug 1527: Autogrow buffer used in reading spool files.  Since they now
1079      include certificate info, eximon was claiming there were spoolfile
1080      syntax errors.
1081
1082JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1083
1084JH/14 Log delivery-related information more consistently, using the sequence
1085      "H=<name> [<ip>]" wherever possible.
1086
1087TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1088      are problematic for Debian distribution, omit them from the release
1089      tarball.
1090
1091JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1092
1093JH/16 Fix string representation of time values on 64bit time_t architectures.
1094      Bug 1561.
1095
1096JH/17 Fix a null-indirection in certextract expansions when a nondefault
1097      output list separator was used.
1098
1099
1100Exim version 4.84
1101-----------------
1102TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1103      checkers that were complaining about end of non-void function with no
1104      return.
1105
1106JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1107      This was a regression introduced in 4.83 by another bugfix.
1108
1109JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1110
1111TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1112      EXPERIMENTAL_DSN is enabled.  Fix from Wolfgang Breyha.
1113
1114
1115Exim version 4.83
1116-----------------
1117
1118TF/01 Correctly close the server side of TLS when forking for delivery.
1119
1120      When a message was received over SMTP with TLS, Exim failed to clear up
1121      the incoming connection properly after forking off the child process to
1122      deliver the message. In some situations the subsequent outgoing
1123      delivery connection happened to have the same fd number as the incoming
1124      connection previously had. Exim would try to use TLS and fail, logging
1125      a "Bad file descriptor" error.
1126
1127TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1128      utilities have not been installed.
1129
1130JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1131      temporary space as the ACL may create new global variables.
1132
1133TL/01 LDAP support uses per connection or global context settings, depending
1134      upon the detected version of the libraries at build time.
1135
1136TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1137      to extract and use the src ip:port in logging and expansions as if it
1138      were a direct connection from the outside internet. PPv2 support was
1139      updated based on HAProxy spec change in May 2014.
1140
1141JH/02 Add ${listextract {number}{list}{success}{fail}}.
1142
1143TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1144      Properly escape header and check for NULL return.
1145
1146PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1147      not dns_use_dnssec.
1148
1149JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1150
1151TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1152      characters in header names, implemented as a verify condition.
1153      Contributed by Michael Fischer v. Mollard.
1154
1155TL/05 Rename SPF condition results err_perm and err_temp to standardized
1156      results permerror and temperror.  Previous values are deprecated but
1157      still accepted.  In a future release, err_perm and err_temp will be
1158      completely removed, which will be a backward incompatibility if the
1159      ACL tests for either of these two old results. Patch contributed by
1160      user bes-internal on the mailing list.
1161
1162JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1163
1164JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1165      selectors, in both main and reject logs.
1166
1167JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1168      failed delivery.
1169
1170JH/07 Add malware type "sock" for talking to simple daemon.
1171
1172JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1173
1174JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1175      routers/transports under cutthrough routing.
1176
1177JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1178      numbers.  Touch up "bool" conditional to keep the same definition.
1179
1180TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1181
1182JH/11 Add dnsdb tlsa lookup.  From Todd Lyons.
1183
1184JH/12 Expand items in router/transport headers_add or headers_remove lists
1185      individually rather than the list as a whole.  Bug 1452.
1186
1187      Required for reasonable handling of multiple headers_ options when
1188      they may be empty; requires that headers_remove items with embedded
1189      colons must have them doubled (or the list-separator changed).
1190
1191TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1192      view the policy declared in the DMARC record. Currently, $dmarc_status
1193      is a combined value of both the record presence and the result of the
1194      analysis.
1195
1196JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport.  Bug 1455.
1197
1198JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1199      dnslookup router and the smtp transport (applying to the forward
1200      lookup).
1201
1202TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1203      of ldap servers used for a specific lookup.  Patch provided by Heiko
1204      Schlichting.
1205
1206JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1207      New variable $lookup_dnssec_authenticated for observability.
1208
1209TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1210      Patch submitted by Lars Timman.
1211
1212JH/19 EXPERIMENTAL_OCSP support under GnuTLS.  Bug 1459.
1213
1214TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1215      Requires trusted mode and valid format message id, aborts otherwise.
1216      Patch contributed by Heiko Schlichting.
1217
1218JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1219      certextract with support for various fields.  Bug 1358.
1220
1221JH/21 Observability of OCSP via variables tls_(in,out)_ocsp.  Stapling
1222      is requested by default, modifiable by smtp transport option
1223      hosts_request_ocsp.
1224
1225JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1226      operate on certificate variables to give certificate fingerprints
1227      Also new ${sha256:cert_variable}.
1228
1229JH/23 The PRDR feature is moved from being Experimental into the mainline.
1230
1231TL/11 Bug 1119: fix memory allocation in string_printing2().  Patch from
1232      Christian Aistleitner.
1233
1234JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1235
1236TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1237      file.  Patch from Wolfgang Breyha.
1238
1239JH/25 Expand the coverage of the delivery $host and $host_address to
1240      client authenticators run in verify callout.  Bug 1476.
1241
1242JH/26 Port service names are now accepted for tls_on_connect_ports, to
1243      align with daemon_smtp_ports.  Bug 72.
1244
1245TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1246      support and error reporting did not work properly.
1247
1248TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1249      and is readable.  Patch from Andrew Colin Kissa.
1250
1251TL/14 Enhance documentation of ${run expansion and how it parses the
1252      commandline after expansion, particularly in the case when an
1253      unquoted variable expansion results in an empty value.
1254
1255JH/27 The TLS SNI feature was broken in 4.82.  Fix it.
1256
1257PP/02 Fix internal collision of T_APL on systems which support RFC3123
1258      by renaming away from it.  Addresses GH issue 15, reported by
1259      Jasper Wallace.
1260
1261JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1262
1263TL/15 SECURITY: prevent double expansion in math comparison functions
1264      (can expand unsanitized data). Not remotely exploitable.
1265      CVE-2014-2972
1266
1267
1268Exim version 4.82
1269-----------------
1270
1271PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1272
1273PP/02 Make -n do something, by making it not do something.
1274      When combined with -bP, the name of an option is not output.
1275
1276PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1277      by GnuTLS.
1278
1279PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1280      $sender_host_name and config options to manage this, and basic check
1281      routines.
1282
1283PP/05 DSCP support for outbound connections and control modifier for inbound.
1284
1285PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1286      (Only plugin which currently uses this is kerberos4, which nobody should
1287      be using, but we should make it available and other future plugins might
1288      conceivably use it, even though it would break NAT; stuff *should* be
1289      using channel bindings instead).
1290
1291PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1292      name; added for Sendmail compatibility; requires admin caller.
1293      Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1294      just ignore it); requires trusted caller.
1295      Also parse but ignore: -Ac -Am -X<logfile>
1296      Bugzilla 1117.
1297
1298TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1299
1300TL/02 Add +smtp_confirmation as a default logging option.
1301
1302TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1303      Patch by Magnus Holmgren from 2007-02-20.
1304
1305TL/04 Bugzilla 1281 - Spec typo.
1306      Bugzilla 1283 - Spec typo.
1307      Bugzilla 1290 - Spec grammar fixes.
1308
1309TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1310
1311TL/06 Add Experimental DMARC support using libopendmarc libraries.
1312
1313TL/07 Fix an out of order global option causing a segfault.  Reported to dev
1314      mailing list by by Dmitry Isaikin.
1315
1316JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1317
1318JH/02 Support "G" suffix to numbers in ${if comparisons.
1319
1320PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1321
1322NM/01 Bugzilla 1197 - Spec typo
1323      Bugzilla 1196 - Spec examples corrections
1324
1325JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1326
1327PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1328      gnutls_enable_pkcs11, but renamed to more accurately indicate its
1329      function.
1330
1331PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1332      Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1333
1334JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1335      "acl {{name}{arg}...}", and optional args on acl condition
1336      "acl = name arg..."
1337
1338JH/05 Permit multiple router/transport headers_add/remove lines.
1339
1340JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1341
1342JH/07 Avoid using a waiting database for a single-message-only transport.
1343      Performance patch from Paul Fisher.  Bugzilla 1262.
1344
1345JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1346      Bugzilla 884.
1347
1348JH/09 Add $headers_added variable, with content from use of ACL modifier
1349      add_header (but not yet added to the message).  Bugzilla 199.
1350
1351JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1352      Pulled from Bugzilla 817 by Wolfgang Breyha.
1353
1354PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1355      CVE-2012-5671
1356      (nb: this is the same fix as in Exim 4.80.1)
1357
1358JH/11 Add A= logging on delivery lines, and a client_set_id option on
1359      authenticators.
1360
1361JH/12 Add optional authenticated_sender logging to A= and a log_selector
1362      for control.
1363
1364PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1365
1366PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1367      advertise SMTP AUTH mechanism to us, instead of a generic
1368      protocol violation error.  Also, make Exim more robust to bad
1369      data from the Dovecot auth socket.
1370
1371TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1372
1373      When a queue runner is handling a message, Exim first routes the
1374      recipient addresses, during which it prunes them based on the retry
1375      hints database. After that it attempts to deliver the message to
1376      any remaining recipients. It then updates the hints database using
1377      the retry rules.
1378
1379      So if a recipient address works intermittently, it can get repeatedly
1380      deferred at routing time. The retry hints record remains fresh so the
1381      address never reaches the final cutoff time.
1382
1383      This is a fairly common occurrence when a user is bumping up against
1384      their storage quota. Exim had some logic in its local delivery code
1385      to deal with this. However it did not apply to per-recipient defers
1386      in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1387
1388      This change adds a proper retry rule check during routing so that the
1389      final cutoff time is checked against the message's age. We only do
1390      this check if there is an address retry record and there is not a
1391      domain retry record; this implies that previous attempts to handle
1392      the address had the retry_use_local_parts option turned on. We use
1393      this as an approximation for the destination being like a local
1394      delivery, as in LMTP.
1395
1396      I suspect this new check makes the old local delivery cutoff check
1397      redundant, but I have not verified this so I left the code in place.
1398
1399TF/02 Correct gecos expansion when From: is a prefix of the username.
1400
1401      Test 0254 submits a message to Exim with the header
1402
1403        Resent-From: f
1404
1405      When I ran the test suite under the user fanf2, Exim expanded
1406      the header to contain my full name, whereas it should have added
1407      a Resent-Sender: header. It erroneously treats any prefix of the
1408      username as equal to the username.
1409
1410      This change corrects that bug.
1411
1412GF/01 DCC debug and logging tidyup
1413      Error conditions log to paniclog rather than rejectlog.
1414      Debug lines prefixed by "DCC: " to remove any ambiguity.
1415
1416TF/03 Avoid unnecessary rebuilds of lookup-related code.
1417
1418PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1419      Bug spotted by Jeremy Harris; was flawed since initial commit.
1420      Would have resulted in OCSP responses post-SNI triggering an Exim
1421      NULL dereference and crash.
1422
1423JH/13 Add $router_name and $transport_name variables.  Bugzilla 308.
1424
1425PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1426      Bug detection, analysis and fix by Samuel Thibault.
1427      Bugzilla 1331, Debian bug #698092.
1428
1429SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1430
1431JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1432      Server implementation by Todd Lyons, client by JH.
1433      Only enabled when compiled with EXPERIMENTAL_PRDR.  A new
1434      config variable "prdr_enable" controls whether the server
1435      advertises the facility.  If the client requests PRDR a new
1436      acl_data_smtp_prdr ACL is called once for each recipient, after
1437      the body content is received and before the acl_smtp_data ACL.
1438      The client is controlled by both of: a hosts_try_prdr option
1439      on the smtp transport, and the server advertisement.
1440      Default client logging of deliveries and rejections involving
1441      PRDR are flagged with the string "PRDR".
1442
1443PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1444      fclose().  Diagnosis by Todd Lyons.
1445
1446PP/17 Update configure.default to handle IPv6 localhost better.
1447      Patch by Alain Williams (plus minor tweaks).
1448      Bugzilla 880.
1449
1450PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1451      This is now consistent with GnuTLS, and is now documented: the
1452      previous undocumented portable approach to treating the option as
1453      unset was to force an expansion failure.  That still works, and
1454      an empty string is now equivalent.
1455
1456PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1457      clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1458      not performing validation itself.
1459
1460PP/20 Added force_command boolean option to pipe transport.
1461      Patch from Nick Koston, of cPanel Inc.
1462
1463JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1464      Bugzilla 321, 823.
1465
1466TF/04 Added udpsend ACL modifier and hexquote expansion operator
1467
1468PP/21 Fix eximon continuous updating with timestamped log-files.
1469      Broken in a format-string cleanup in 4.80, missed when I repaired the
1470      other false fix of the same issue.
1471      Report and fix from Heiko Schlichting.
1472      Bugzilla 1363.
1473
1474PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1475      Report from Prashanth Katuri.
1476
1477PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1478      It's SecureTransport, so affects any MacOS clients which use the
1479      system-integrated TLS libraries, including email clients.
1480
1481PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1482      using a MIME ACL for non-SMTP local injection.
1483      Report and assistance in diagnosis by Warren Baker.
1484
1485TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1486
1487JH/16 Fix comparisons for 64b.  Bugzilla 1385.
1488
1489TL/09 Add expansion variable $authenticated_fail_id to keep track of
1490      last id that failed so it may be referenced in subsequent ACL's.
1491
1492TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1493      Alexander Miroch.
1494
1495TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1496      ldap library initialization, allowing self-signed CA's to be
1497      used. Also properly sets require_cert option later in code by
1498      using NULL (global ldap config) instead of ldap handle (per
1499      session). Bug diagnosis and testing by alxgomz.
1500
1501TL/12 Enhanced documentation in the ratelimit.pl script provided in
1502      the src/util/ subdirectory.
1503
1504TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1505      renamed to Transport Post Delivery Action by Jeremy Harris, as
1506      EXPERIMENTAL_TPDA.
1507
1508TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1509      when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1510      redis_servers = needs to be configured which will be used by the redis
1511      lookup.  Patch from Warren Baker, of The Packet Hub.
1512
1513TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1514
1515TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1516      hostname or reverse DNS when processing a host list. Used suggestions
1517      from multiple comments on this bug.
1518
1519TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1520
1521TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1522      Missed a few lines, added it to make the runtest require no keyboard
1523      interaction.
1524
1525TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1526      contains upper case chars. Make router use caseful_local_part.
1527
1528TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1529      support when GnuTLS has been built with p11-kit.
1530
1531
1532Exim version 4.80.1
1533-------------------
1534
1535PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1536      CVE-2012-5671
1537      This, or similar/improved, will also be change PP/11 of 4.82.
1538
1539
1540Exim version 4.80
1541-----------------
1542
1543PP/01 Handle short writes when writing local log-files.
1544      In practice, only affects FreeBSD (8 onwards).
1545      Bugzilla 1053, with thanks to Dmitry Isaikin.
1546
1547NM/01 Bugzilla 949 - Documentation tweak
1548
1549NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1550      improved.
1551
1552NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1553
1554PP/02 Implemented gsasl authenticator.
1555
1556PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1557
1558PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1559      `pkg-config foo` for cflags/libs.
1560
1561PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1562      with rest of GSASL and with heimdal_gssapi.
1563
1564PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1565      `pkg-config foo` for cflags/libs for the TLS implementation.
1566
1567PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1568      properties get this fed in as external SSF.  A number of robustness
1569      and debugging improvements to the cyrus_sasl authenticator.
1570
1571PP/08 cyrus_sasl server now expands the server_realm option.
1572
1573PP/09 Bugzilla 1214 - Log authentication information in reject log.
1574      Patch by Jeremy Harris.
1575
1576PP/10 Added dbmjz lookup type.
1577
1578PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1579
1580PP/12 MAIL args handles TAB as well as SP, for better interop with
1581      non-compliant senders.
1582      Analysis and variant patch by Todd Lyons.
1583
1584NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1585      Bug report from Lars Müller <lars@samba.org> (via SUSE),
1586      Patch from Dirk Mueller <dmueller@suse.com>
1587
1588PP/13 tls_peerdn now print-escaped for spool files.
1589      Observed some $tls_peerdn in wild which contained \n, which resulted
1590      in spool file corruption.
1591
1592PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1593      values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1594      or write after TLS renegotiation, which otherwise led to messages
1595      "Got SSL error 2".
1596
1597TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1598      as a tracking header (ie: a signed header comes before the signature).
1599      Patch from Wolfgang Breyha.
1600
1601JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1602      comma-sep list; embedded commas doubled.
1603
1604JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1605
1606PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1607      diagnostics.
1608      Report and patch from Dmitry Banschikov.
1609
1610PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1611      Removed SSL_clear() after SSL_new() which led to protocol negotiation
1612      failures.  We appear to now support TLS1.1+ with Exim.
1613
1614PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1615      lets Exim select keys and certificates based upon TLS SNI from client.
1616      Also option tls_sni on SMTP Transports.  Also clear $tls_bits correctly
1617      before an outbound SMTP session.  New log_selector, +tls_sni.
1618
1619PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1620      NULL dereference.  Report and patch from Alun Jones.
1621
1622PP/19 DNS resolver init changes for NetBSD compatibility.  (Risk of breakage
1623      on less well tested platforms).  Obviates NetBSD pkgsrc patch-ac.
1624      Not seeing resolver debug output on NetBSD, but suspect this is a
1625      resolver implementation change.
1626
1627PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1628      Left warnings.  Added "eximon gdb" invocation mode.
1629
1630PP/21 Defaulting "accept_8bitmime" to true, not false.
1631
1632PP/22 Added -bw for inetd wait mode support.
1633
1634PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1635      locate the relevant includes and libraries.  Made this the default.
1636
1637PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1638      Bugzilla 1246, report and most of solution from Tomasz Kusy.
1639
1640JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1641      This may cause build issues on older platforms.
1642
1643PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1644      gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1645      gnutls_require_mac & gnutls_require_protocols (no longer supported).
1646      Added SNI support via GnuTLS too.
1647      Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1648
1649PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1650
1651PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1652      Applied second patch from Janne, implementing suggestion to default
1653      multiple-strings-in-record handling to match SPF spec.
1654
1655JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1656
1657PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1658      read-only, out of scope).
1659      Patch from Wolfgang Breyha, report from Stuart Northfield.
1660
1661PP/29 Fix three issues highlighted by clang analyser static analysis.
1662      Only crash-plausible issue would require the Cambridge-specific
1663      iplookup router and a misconfiguration.
1664      Report from Marcin Mirosław.
1665
1666PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1667
1668PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1669      now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1670      As part of this, removing so much warning spew let me fix some minor
1671      real issues in debug logging.
1672
1673PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1674      assignment on my part.  Fixed.
1675
1676PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1677      of NSS, for GnuTLS/NSS interop.  Problem root cause diagnosis by
1678      Janne Snabb (who went above and beyond: thank you).
1679
1680PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1681      string otherwise requires a connection and a bunch more work and it's
1682      relatively easy to get wrong.  Should also expose TLS library linkage
1683      problems.
1684
1685PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1686      64-bit ${eval} (JH/03).
1687
1688PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1689      GNU libc to support some of the 64-bit stuff, should not lead to
1690      conflicts.  Defined before os.h is pulled in, so if a given platform
1691      needs to override this, it can.
1692
1693PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1694      protection layer was required, which is not implemented.
1695      Bugzilla 1254, patch from Wolfgang Breyha.
1696
1697PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1698      into Exim, default to IKE id 23 from RFC 5114 (2048 bit).  Make
1699      tls_dhparam take prime identifiers.  Also unbreak combination of
1700      OpenSSL+DH_params+TLSSNI.
1701
1702PP/39 Disable SSLv2 by default in OpenSSL support.
1703
1704
1705Exim version 4.77
1706-----------------
1707
1708PP/01 Solaris build fix for Oracle's LDAP libraries.
1709      Bugzilla 1109, patch from Stephen Usher.
1710
1711TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1712
1713TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1714      whitespace trailer
1715
1716TF/02 Fix a couple more cases where we did not log the error message
1717      when unlink() failed. See also change 4.74-TF/03.
1718
1719TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1720      lock up or crash if it happened to be inside a call to libc when it
1721      got a SIGUSR1 from exiwhat.
1722
1723      The SIGUSR1 handler appends the current process status to the process
1724      log which is later printed by exiwhat. It used to use the general
1725      purpose logging code to do this, but several functions it calls are
1726      not safe for signals.
1727
1728      The new output code in the SIGUSR1 handler is specific to the process
1729      log, and simple enough that it's easy to inspect for signal safety.
1730      Removing some special cases also simplifies the general logging code.
1731      Removing the spurious timestamps from the process log simplifies
1732      exiwhat.
1733
1734TF/04 Improved ratelimit ACL condition.
1735
1736      The /noupdate option has been deprecated in favour of /readonly which
1737      has clearer semantics. The /leaky, /strict, and /readonly update modes
1738      are mutually exclusive. The update mode is no longer included in the
1739      database key; it just determines when the database is updated. (This
1740      means that when you upgrade Exim will forget old rate measurements.)
1741
1742      Exim now checks that the per_* options are used with an update mode that
1743      makes sense for the current ACL. For example, when Exim is processing a
1744      message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1745      per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1746      must specify per_mail/readonly. If you omit the update mode it defaults to
1747      /leaky where that makes sense (as before) or /readonly where required.
1748
1749      The /noupdate option is now undocumented but still supported for
1750      backwards compatibility. It is equivalent to /readonly except that in
1751      ACLs where /readonly is required you may specify /leaky/noupdate or
1752      /strict/noupdate which are treated the same as /readonly.
1753
1754      A useful new feature is the /count= option. This is a generalization
1755      of the per_byte option, so that you can measure the throughput of other
1756      aggregate values. For example, the per_byte option is now equivalent
1757      to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1758
1759      The per_rcpt option has been generalized using the /count= mechanism
1760      (though it's more complicated than the per_byte equivalence). When it is
1761      used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1762      measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1763      or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1764      /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1765      Note that using per_rcpt with a non-readonly update mode in more than
1766      one ACL will cause the recipients to be double-counted. (The per_mail
1767      and per_byte options don't have this problem.)
1768
1769      The handling of very low rates has changed slightly. If the computed rate
1770      is less than the event's count (usually one) then this event is the first
1771      after a long gap. In this case the rate is set to the same as this event's
1772      count, so that the first message of a spam run is counted properly.
1773
1774      The major new feature is a mechanism for counting the rate of unique
1775      events. The new per_addr option counts the number of different
1776      recipients that someone has sent messages to in the last time period. It
1777      behaves like per_rcpt if all the recipient addresses are different, but
1778      duplicate recipient addresses do not increase the measured rate. Like
1779      the /count= option this is a general mechanism, so the per_addr option
1780      is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1781      example, measure the rate that a client uses different sender addresses
1782      with the options per_mail/unique=$sender_address. There are further
1783      details in the main documentation.
1784
1785TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1786
1787TF/06 Removed a few PCRE remnants.
1788
1789TF/07 Automatically extract Exim's version number from tags in the git
1790      repository when doing development or release builds.
1791
1792PP/02 Raise smtp_cmd_buffer_size to 16kB.
1793      Bugzilla 879.  Patch from Paul Fisher.
1794
1795PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1796      Heavily based on revision 40f9a89a from Simon Arlott's tree.
1797      Bugzilla 97.
1798
1799PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1800
1801PP/05 Variable $av_failed, true if the AV scanner deferred.
1802      Bugzilla 1078.  Patch from John Horne.
1803
1804PP/06 Stop make process more reliably on build failure.
1805      Bugzilla 1087.  Patch from Heiko Schlittermann.
1806
1807PP/07 Make maildir_use_size_file an _expandable_ boolean.
1808      Bugzilla 1089.  Patch from Heiko Schlittermann.
1809
1810PP/08 Handle ${run} returning more data than OS pipe buffer size.
1811      Bugzilla 1131.  Patch from Holger Weiß.
1812
1813PP/09 Handle IPv6 addresses with SPF.
1814      Bugzilla 860.  Patch from Wolfgang Breyha.
1815
1816PP/10 GnuTLS: support TLS 1.2 & 1.1.
1817      Bugzilla 1156.
1818      Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
1819      Bugzilla 1095.
1820
1821PP/11 match_* no longer expand right-hand-side by default.
1822      New compile-time build option, EXPAND_LISTMATCH_RHS.
1823      New expansion conditions, "inlist", "inlisti".
1824
1825PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
1826
1827PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
1828
1829PP/14 fix log_write() format string regression from TF/03.
1830      Bugzilla 1152.  Patch from Dmitry Isaikin.
1831
1832
1833Exim version 4.76
1834-----------------
1835
1836PP/01 The new ldap_require_cert option would segfault if used.  Fixed.
1837
1838PP/02 Harmonised TLS library version reporting; only show if debugging.
1839      Layout now matches that introduced for other libraries in 4.74 PP/03.
1840
1841PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
1842
1843PP/04 New "dns_use_edns0" global option.
1844
1845PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
1846      Bugzilla 1098.
1847
1848PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
1849      nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
1850
1851TK/01 Updated PolarSSL code to 0.14.2.
1852      Bugzilla 1097. Patch from Andreas Metzler.
1853
1854PP/07 Catch divide-by-zero in ${eval:...}.
1855      Fixes bugzilla 1102.
1856
1857PP/08 Condition negation of bool{}/bool_lax{} did not negate.  Fixed.
1858      Bugzilla 1104.
1859
1860TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
1861      format-string attack -- SECURITY: remote arbitrary code execution.
1862
1863TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
1864      time unintentionally subject to list matching rules, letting the header
1865      cause arbitrary Exim lookups (of items which can occur in lists, *not*
1866      arbitrary string expansion). This allowed for information disclosure.
1867
1868PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
1869      INT_MIN/-1 -- value coerced to INT_MAX.
1870
1871
1872Exim version 4.75
1873-----------------
1874
1875NM/01 Workaround for PCRE version dependency in version reporting
1876      Bugzilla 1073
1877
1878TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
1879      This fixes portability to compilers other than gcc, notably
1880      Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
1881
1882TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
1883      makefiles for portability to HP-UX and POSIX correctness.
1884
1885PP/01 Permit LOOKUP_foo enabling on the make command-line.
1886      Also via indented variable definition in the Makefile.
1887      (Debugging by Oliver Heesakkers).
1888
1889PP/02 Restore caching of spamd results with expanded spamd_address.
1890      Patch from author of expandable spamd_address patch, Wolfgang Breyha.
1891
1892PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
1893      Improves build reliability.  Fix from: Frank Elsner
1894
1895NM/02 Fix wide character breakage in the rfc2047 coding
1896      Fixes bug 1064. Patch from Andrey N. Oktyabrski
1897
1898NM/03 Allow underscore in dnslist lookups
1899      Fixes bug 1026. Patch from Graeme Fowler
1900
1901PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
1902      Code patches from Adam Ciarcinski of NetBSD.
1903
1904NM/04 Fixed exiqgrep to cope with mailq missing size issue
1905      Fixes bug 943.
1906
1907PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
1908      is logged, to avoid truncation. Patch from John Horne.
1909
1910PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
1911      Patch from Jakob Hirsch.
1912
1913PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
1914      SQL string expansion failure details.
1915      Patch from Andrey Oktyabrski.
1916
1917PP/08 Bugzilla 486: implement %M datestamping in log filenames.
1918      Patch from Simon Arlott.
1919
1920PP/09 New lookups functionality failed to compile on old gcc which rejects
1921      extern declarations in function scope.
1922      Patch from Oliver Fleischmann
1923
1924PP/10 Use sig_atomic_t for flags set from signal handlers.
1925      Check getgroups() return and improve debugging.
1926      Fixed developed for diagnosis in bug 927 (which turned out to be
1927      a kernel bug).
1928
1929PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
1930      Patch from Mark Zealey.
1931
1932PP/12 Bugzilla 1056: Improved spamd server selection.
1933      Patch from Mark Zealey.
1934
1935PP/13 Bugzilla 1086: Deal with maildir quota file races.
1936      Based on patch from Heiko Schlittermann.
1937
1938PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
1939      Patch from Uwe Doering, sign-off by Michael Haardt.
1940
1941NM/05 Fix to spam.c to accommodate older gcc versions which dislike
1942      variable declaration deep within a block.  Bug and patch from
1943      Dennis Davis.
1944
1945PP/15 lookups-Makefile IRIX compatibility coercion.
1946
1947PP/16 Make DISABLE_DKIM build knob functional.
1948
1949NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
1950      Patch by Simon Arlott
1951
1952TF/03 Fix valgrind.h portability to C89 compilers that do not support
1953      variable argument macros. Our copy now differs from upstream.
1954
1955
1956Exim version 4.74
1957-----------------
1958
1959TF/01 Failure to get a lock on a hints database can have serious
1960      consequences so log it to the panic log.
1961
1962TF/02 Log LMTP confirmation messages in the same way as SMTP,
1963      controlled using the smtp_confirmation log selector.
1964
1965TF/03 Include the error message when we fail to unlink a spool file.
1966
1967DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
1968      With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
1969      for maintaining out-of-tree patches for some time.
1970
1971PP/01 Bugzilla 139: Documentation and portability issues.
1972      Avoid GNU Makefile-isms, let Exim continue to build on BSD.
1973      Handle per-OS dynamic-module compilation flags.
1974
1975PP/02 Let /dev/null have normal permissions.
1976      The 4.73 fixes were a little too stringent and complained about the
1977      permissions on /dev/null.  Exempt it from some checks.
1978      Reported by Andreas M. Kirchwitz.
1979
1980PP/03 Report version information for many libraries, including
1981      Exim version information for dynamically loaded libraries.  Created
1982      version.h, now support a version extension string for distributors
1983      who patch heavily. Dynamic module ABI change.
1984
1985PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
1986      privilege escalation vulnerability whereby the Exim run-time user
1987      can cause root to append content of the attacker's choosing to
1988      arbitrary files.
1989
1990PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
1991      (Wolfgang Breyha)
1992
1993PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
1994      If dropping privileges for untrusted macros, we disabled normal logging
1995      on the basis that it would fail; for the Exim run-time user, this is not
1996      the case, and it resulted in successful deliveries going unlogged.
1997      Fixed.  Reported by Andreas Metzler.
1998
1999
2000Exim version 4.73
2001-----------------
2002
2003PP/01 Date: & Message-Id: revert to normally being appended to a message,
2004      only prepend for the Resent-* case.  Fixes regression introduced in
2005      Exim 4.70 by NM/22 for Bugzilla 607.
2006
2007PP/02 Include check_rfc2047_length in configure.default because we're seeing
2008      increasing numbers of administrators be bitten by this.
2009
2010JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2011
2012PP/03 Bugzilla 994: added openssl_options main configuration option.
2013
2014PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2015
2016PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2017
2018PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2019
2020PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2021      without a peer certificate, leading to a segfault because of an
2022      assumption that peers always have certificates.  Be a little more
2023      paranoid.  Problem reported by Martin Tscholak.
2024
2025PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2026      filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2027      NB: ClamAV planning to remove STREAM in "middle of 2010".
2028      CL also introduces -bmalware, various -d+acl logging additions and
2029      more caution in buffer sizes.
2030
2031PP/09 Implemented reverse_ip expansion operator.
2032
2033PP/10 Bugzilla 937: provide a "debug" ACL control.
2034
2035PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2036
2037PP/12 Bugzilla 973: Implement --version.
2038
2039PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2040
2041PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2042
2043PP/15 Bugzilla 816: support multiple condition rules on Routers.
2044
2045PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2046      condition rules, instead of bool{}.  Make both bool{} and bool_lax{}
2047      ignore trailing whitespace.
2048
2049JJ/02 prevent non-panic DKIM error from being sent to paniclog
2050
2051JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2052      "exim" to be used
2053
2054PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2055      Notification from Dr Andrew Aitchison.
2056
2057PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2058      ExtendedDetectionInfo response format.
2059      Notification from John Horne.
2060
2061PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2062      compatible.
2063
2064PP/20 Added a CONTRIBUTING file.  Fixed the documentation build to use http:
2065      XSL and documented dependency on system catalogs, with examples of how
2066      it normally works.
2067
2068DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2069      access.
2070
2071DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2072      of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2073      configuration file which is writeable by the Exim user or group.
2074
2075DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2076      of configuration files to cover files specified with the -C option if
2077      they are going to be used with root privileges, not just the default
2078      configuration file.
2079
2080DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2081      option (effectively making it always true).
2082
2083DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2084      files to be used while preserving root privileges.
2085
2086DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2087      that rogue child processes cannot use them.
2088
2089PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2090      run-time user, instead of root.
2091
2092PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2093      Exim run-time user without dropping privileges.
2094
2095DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2096      result string, instead of calling string_vformat() twice with the same
2097      arguments.
2098
2099DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2100      for other users. Others should always drop root privileges if they use
2101      -C on the command line, even for a whitelisted configure file.
2102
2103DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2104
2105NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2106
2107
2108Exim version 4.72
2109-----------------
2110
2111JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2112      $data_path, and $header_path variables; fixed documentation bugs and
2113      typos
2114
2115JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2116      exipick to access non-standard spools, including the "frozen" queue
2117      (Finput)
2118
2119NM/01 Bugzilla 965: Support mysql stored procedures.
2120      Patch from Alain Williams
2121
2122NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2123
2124NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2125      Patch from Andreas Metzler
2126
2127NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2128      Patch from Kirill Miazine
2129
2130NM/05 Bugzilla 671: Added umask to procmail example.
2131
2132JJ/03 installed exipick 20100323.0, fixing doc bug
2133
2134NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2135      directory.  Notification and patch from Dan Rosenberg.
2136
2137TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2138
2139TK/02 Improve log output when DKIM signing operation fails.
2140
2141MH/01 Treat the transport option dkim_domain as a colon separated
2142      list, not as a single string, and sign the message with each element,
2143      omitting multiple occurences of the same signer.
2144
2145NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2146      Bugzilla 985, 986.  Patch by Simon Arlott
2147
2148NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2149      Patch by Simon Arlott
2150
2151PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2152      MBX locking.  Notification from Dan Rosenberg.
2153
2154
2155Exim version 4.71
2156-----------------
2157
2158TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2159
2160NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2161
2162NM/02 Bugzilla 722: Documentation for randint.  Better randomness defaults.
2163
2164NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2165
2166NM/04 Bugzilla 915: Flag broken perl installation during build.
2167
2168
2169Exim version 4.70
2170-----------------
2171
2172TK/01 Added patch by Johannes Berg that expands the main option
2173      "spamd_address" if it starts with a dollar sign.
2174
2175TK/02 Write list of recipients to X-Envelope-Sender header when building
2176      the mbox-format spool file for content scanning (suggested by Jakob
2177      Hirsch).
2178
2179TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2180      (http://www.dcc-servers.net/) support via dccifd. Activated by
2181      setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2182
2183TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2184      by Mark Daniel Reidel <mr@df.eu>.
2185
2186NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2187      When building exim an external PCRE library is now needed -
2188      PCRE is a system library on the majority of modern systems.
2189      See entry on PCRE_LIBS in EDITME file.
2190
2191NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2192      conversation.  Added nologin parameter to request.
2193      Patch contributed by Kirill Miazine.
2194
2195TF/01 Do not log submission mode rewrites if they do not change the address.
2196
2197TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2198
2199NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2200      log files in place.  Contributed by Roberto Lima.
2201
2202NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2203
2204TF/03 Bugzilla 615: When checking the local_parts router precondition
2205      after a local_part_suffix or local_part_prefix option, Exim now
2206      does not use the address's named list lookup cache, since this
2207      contains cached lookups for the whole local part.
2208
2209NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2210      Robert Millan.  Documentation is in experimental-spec.txt.
2211
2212TF/04 Bugzilla 668: Fix parallel build (make -j).
2213
2214NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2215
2216NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2217      Patch provided by Jan Srzednicki.
2218
2219TF/05 Leading white space used to be stripped from $spam_report which
2220      wrecked the formatting. Now it is preserved.
2221
2222TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2223      that they are available at delivery time.
2224
2225TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2226
2227TF/08 TLS error reporting now respects the incoming_interface and
2228      incoming_port log selectors.
2229
2230TF/09 Produce a more useful error message if an SMTP transport's hosts
2231      setting expands to an empty string.
2232
2233NM/06 Bugzilla 744: EXPN did not work under TLS.
2234      Patch provided by Phil Pennock.
2235
2236NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2237      Patch provided by Richard Godbee.
2238
2239NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2240      acl_smtp_notquit, added index entry.
2241
2242NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2243      Patch provided by Eugene Bujak.
2244
2245NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2246      accept(). Patch provided by Maxim Dounin.
2247
2248NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2249      Patch provided by Phil Pennock.
2250
2251NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2252
2253NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2254      Patch provided by Brad "anomie" Jorsch.
2255
2256NM/14 Bugzilla 622: Added timeout setting to transport filter.
2257      Patch provided by Dean Brooks.
2258
2259TK/05 Add native DKIM support (does not depend on external libraries).
2260
2261NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2262      Patch provided by Graeme Fowler.
2263
2264NM/16 Bugzilla 851: Documentation example syntax fix.
2265
2266NM/17 Changed NOTICE file to remove references to embedded PCRE.
2267
2268NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2269      lsearch.
2270
2271NM/19 Bugzilla 745: TLS version reporting.
2272      Patch provided by Phil Pennock.
2273
2274NM/20 Bugzilla 167: bool: condition support.
2275      Patch provided by Phil Pennock.
2276
2277NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2278      clients. Patch provided by Phil Pennock.
2279
2280NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2281      Patch provided by Brad "anomie" Jorsch.
2282
2283NM/23 Bugzilla 687: Fix misparses in eximstats.
2284      Patch provided by Heiko Schlittermann.
2285
2286NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2287      Patch provided by Heiko Schlittermann.
2288
2289NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2290      plus update to original patch.
2291
2292NM/26 Bugzilla 799: Documentation correction for ratelimit.
2293
2294NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2295      Patch provided by David Brownlee.
2296
2297NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2298
2299NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2300
2301NM/30 Bugzilla 888: TLS documentation bugfixes.
2302
2303NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2304
2305NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2306      Unlike the original bugzilla I have changed all shell scripts in src tree.
2307
2308NM/33 Bugzilla 898: Transport filter timeout fix.
2309      Patch by Todd Rinaldo.
2310
2311NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2312      Patch by Serge Demonchaux.
2313
2314NM/35 Bugzilla 39: Base64 decode bug fixes.
2315      Patch by Jakob Hirsch.
2316
2317NM/36 Bugzilla 909: Correct connect() call in dcc code.
2318
2319NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2320
2321NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2322
2323NM/39 Bugzilla 911: Fixed MakeLinks build script.
2324
2325
2326Exim version 4.69
2327-----------------
2328
2329TK/01 Add preliminary DKIM support. Currently requires a forked version of
2330      ALT-N's libdkim that I have put here:
2331      http://duncanthrax.net/exim-experimental/
2332
2333      Note to Michael Haardt: I had to rename some vars in sieve.c. They
2334      were called 'true' and it seems that C99 defines that as a reserved
2335      keyword to be used with 'bool' variable types. That means you could
2336      not include C99-style headers which use bools without triggering
2337      build errors in sieve.c.
2338
2339NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2340      as mailq or other aliases.  Changed the --help handling significantly
2341      to do whats expected.  exim_usage() emits usage/help information.
2342
2343SC/01 Added the -bylocaldomain option to eximstats.
2344
2345NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2346
2347NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2348
2349NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2350
2351
2352Exim version 4.68
2353-----------------
2354
2355PH/01 Another patch from the Sieve maintainer.
2356
2357PH/02 When an IPv6 address is converted to a string for single-key lookup
2358      in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2359      dots are used instead of colons so that keys in lsearch files need not
2360      contain colons. This was done some time before quoting was made available
2361      in lsearch files. However, iplsearch files do require colons in IPv6 keys
2362      (notated using the quote facility) so as to distinguish them from IPv4
2363      keys. This meant that lookups for IP addresses in host lists did not work
2364      for iplsearch lookups.
2365
2366      This has been fixed by arranging for IPv6 addresses to be expressed with
2367      colons if the lookup type is iplsearch. This is not incompatible, because
2368      previously such lookups could never work.
2369
2370      The situation is now rather anomalous, since one *can* have colons in
2371      ordinary lsearch keys. However, making the change in all cases is
2372      incompatible and would probably break a number of configurations.
2373
2374TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2375      version.
2376
2377MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2378      conversion specification without a maximum field width, thereby enabling
2379      a rogue spamd server to cause a buffer overflow. While nobody in their
2380      right mind would setup Exim to query an untrusted spamd server, an
2381      attacker that gains access to a server running spamd could potentially
2382      exploit this vulnerability to run arbitrary code as the Exim user.
2383
2384TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2385      $primary_hostname instead of what libspf2 thinks the hosts name is.
2386
2387MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2388      a directory entry by the name of the lookup key. Previously, if a
2389      symlink pointed to a non-existing file or a file in a directory that
2390      Exim lacked permissions to read, a lookup for a key matching that
2391      symlink would fail. Now it is enough that a matching directory entry
2392      exists, symlink or not. (Bugzilla 503.)
2393
2394PH/03 The body_linecount and body_zerocount variables are now exported in the
2395      local_scan API.
2396
2397PH/04 Added the $dnslist_matched variable.
2398
2399PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2400      This means they are set thereafter only if the connection becomes
2401      encrypted.
2402
2403PH/06 Added the client_condition to authenticators so that some can be skipped
2404      by clients under certain conditions.
2405
2406PH/07 The error message for a badly-placed control=no_multiline_responses left
2407      "_responses" off the end of the name.
2408
2409PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2410
2411PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2412      (without spaces) instead of just copying the configuration text.
2413
2414PH/10 Added the /noupdate option to the ratelimit ACL condition.
2415
2416PH/11 Added $max_received_linelength.
2417
2418PH/12 Added +ignore_defer and +include_defer to host lists.
2419
2420PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2421      way in which PCRE > 7.0 is built.
2422
2423PH/14 Implemented queue_only_load_latch.
2424
2425PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2426      MAIL command. The effect was to mangle the value on 64-bit systems.
2427
2428PH/16 Another patch from the Sieve maintainer.
2429
2430PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2431
2432PH/18 If a system quota error occurred while trying to create the file for
2433      a maildir delivery, the message "Mailbox is full" was not appended to the
2434      bounce if the delivery eventually timed out. Change 4.67/27 below applied
2435      only to a quota excession during the actual writing of the file.
2436
2437PH/19 It seems that peer DN values may contain newlines (and other non-printing
2438      characters?) which causes problems in log lines. The DN values are now
2439      passed through string_printing() before being added to log lines.
2440
2441PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2442      and InterBase are left for another time.)
2443
2444PH/21 Added message_body_newlines option.
2445
2446PH/22 Guard against possible overflow in moan_check_errorcopy().
2447
2448PH/23 POSIX allows open() to be a macro; guard against that.
2449
2450PH/24 If the recipient of an error message contained an @ in the local part
2451      (suitably quoted, of course), incorrect values were put in $domain and
2452      $local_part during the evaluation of errors_copy.
2453
2454
2455Exim version 4.67
2456-----------------
2457
2458MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2459      is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2460      Jan Srzednicki.
2461
2462PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2463      issue a MAIL command.
2464
2465PH/02 In an ACL statement such as
2466
2467        deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2468
2469      if a client was not listed at all, or was listed with a value other than
2470      127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2471      the condition was not true (as it should be), so access was not denied.
2472      The bug was that the ! inversion was incorrectly passed on to the second
2473      item. This has been fixed.
2474
2475PH/03 Added additional dnslists conditions == and =& which are different from
2476      = and & when the dns lookup returns more than one IP address.
2477
2478PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2479      cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2480
2481PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2482      FSYNC, which compiles an option called disable_fsync that allows for
2483      bypassing fsync(). The documentation is heavily laced with warnings.
2484
2485SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2486
2487PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2488      with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2489      to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2490      including adding "make clean"; (3) Added -fPIC when compiling the test
2491      dynamically loaded module, to get rid of a warning.
2492
2493MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2494      message fails, move_frozen_messages = true and ignore_bounce_errors_after
2495      = 0s. The bug is otherwise harmless.
2496
2497PH/07 There was a bug in the dovecot authenticator such that the value of
2498      $auth1 could be overwritten, and so not correctly preserved, after a
2499      successful authentication. This usually meant that the value preserved by
2500      the server_setid option was incorrect.
2501
2502PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2503
2504PH/09 Installed PCRE release 7.0.
2505
2506PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2507      run for batched SMTP input. It is now run at the start of every message
2508      in the batch. While fixing this I discovered that the process information
2509      (output by running exiwhat) was not always getting set for -bs and -bS
2510      input. This is fixed, and it now also says "batched" for BSMTP.
2511
2512PH/11 Added control=no_pipelining.
2513
2514PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2515      patch, slightly modified), and move the expansion of helo_data till after
2516      the connection is made in the smtp transport (so it can use these
2517      values).
2518
2519PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2520
2521PH/14 Added log_selector = +pid.
2522
2523PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2524
2525PH/16 Add ${if forany and ${if forall.
2526
2527PH/17 Added dsn_from option to vary the From: line in DSNs.
2528
2529PH/18 Flush SMTP output before performing a callout, unless control =
2530      no_callout_flush is set.
2531
2532PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2533      was true (the default) a successful delivery failed to delete the retry
2534      item, thus causing premature timeout of the address. The bug is now
2535      fixed.
2536
2537PH/20 Added hosts_avoid_pipelining to the smtp transport.
2538
2539PH/21 Long custom messages for fakedefer and fakereject are now split up
2540      into multiline responses in the same way that messages for "deny" and
2541      other ACL rejections are.
2542
2543PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2544      with slight modification.
2545
2546PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2547      draft, changing the syntax and factoring some duplicate code".
2548
2549PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2550      for deliveries of the second and subsequent messages over the same SMTP
2551      connection.
2552
2553PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2554      ${reduce, with only minor "tidies".
2555
2556SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2557
2558PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2559      expansion side effects.
2560
2561PH/27 When a message times out after an over-quota error from an Exim-imposed
2562      quota, the bounce message says "mailbox is full". This message was not
2563      being given when it was a system quota that was exceeded. It now should
2564      be the same.
2565
2566MH/03 Made $recipients available in local_scan(). local_scan() already has
2567      better access to the recipient list through recipients_list[], but
2568      $recipients can be useful in postmaster-provided expansion strings.
2569
2570PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2571      in the case of a MAIL command with additional options following the
2572      address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2573      were accidentally chopped off.
2574
2575PH/29 SMTP synchronization checks are implemented when a command is read -
2576      there is a check that no more input is waiting when there shouldn't be
2577      any. However, for some commands, a delay in an ACL can mean that it is
2578      some time before the response is written. In this time, more input might
2579      arrive, invalidly. So now there are extra checks after an ACL has run for
2580      HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2581      pipelining has not been advertised.
2582
2583PH/30 MH's patch to allow iscntrl() characters to be list separators.
2584
2585PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2586      returned in the SMTP response when smtp_return_error_details was false.
2587      This has been fixed.
2588
2589PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2590      instead of the C I/O that was originally supplied, because problems were
2591      reported on Solaris.
2592
2593PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2594      Exim which did not show up earlier: it was assuming that a call to
2595      SSL_CTX_set_info_callback() might give an error value. In fact, there is
2596      no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2597      was a macro that became an assignment, so it seemed to work. This has
2598      changed to a proper function call with a void return, hence the compile
2599      error. Exim's code has been fixed.
2600
2601PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2602      cpus.
2603
2604PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2605
2606PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2607
2608PH/37 If a message is not accepted after it has had an id assigned (e.g.
2609      because it turns out to be too big or there is a timeout) there is no
2610      "Completed" line in the log. When some messages of this type were
2611      selected by exigrep, they were listed as "not completed". Others were
2612      picked up by some special patterns. I have improved the selection
2613      criteria to be more general.
2614
2615PH/38 The host_find_failed option in the manualroute router can now be set
2616      to "ignore", to completely ignore a host whose IP address cannot be
2617      found. If all hosts are ignored, the behaviour is controlled by the new
2618      host_all_ignored option.
2619
2620PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2621      homing or because of multiple MX records with /mx) generated more than
2622      one IP address, and the following item turned out to be the local host,
2623      all the secondary addresses of the first item were incorrectly removed
2624      from the list, along with the local host and any following hosts (which
2625      is what is supposed to happen).
2626
2627PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2628      whoever called Exim into the -H file. In the case of the daemon it was
2629      behaving confusingly. When first started, it used values for whoever
2630      started the daemon, but after a SIGHUP it used the Exim user (because it
2631      calls itself on a restart). I have changed the code so that it now always
2632      uses the Exim user.
2633
2634PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2635      message are rejected with the same error (e.g. no authentication or bad
2636      sender address), and a DATA command is nevertheless sent (as can happen
2637      with PIPELINING or a stupid MUA), the error message that was given to the
2638      RCPT commands is included in the rejection of the DATA command. This is
2639      intended to be helpful for MUAs that show only the final error to their
2640      users.
2641
2642PH/42 Another patch from the Sieve maintainer.
2643
2644SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2645      Eximstats - Fixed some broken HTML links and added missing column headers
2646                  (Jez Hancock).
2647      Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2648                  columns for Rejects, Temp Rejects, Ham, and Spam rows.
2649
2650SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2651
2652PH/43 Yet another patch from the Sieve maintainer.
2653
2654PH/44 I found a way to check for a TCP/IP connection going away before sending
2655      the response to the final '.' that terminates a message, but only in the
2656      case where the client has not sent further data following the '.'
2657      (unfortunately, this is allowed). However, in many cases there won't be
2658      any further data because there won't be any more messages to send. A call
2659      to select() can be used: if it shows that the input is "ready", there is
2660      either input waiting, or the socket has been closed. An attempt to read
2661      the next input character can distinguish the two cases. Previously, Exim
2662      would have sent an OK response which the client would never have see.
2663      This could lead to message repetition. This fix should cure that, at
2664      least in a lot of common cases.
2665
2666PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2667      advertised in response to EHLO.
2668
2669
2670Exim version 4.66
2671-----------------
2672
2673PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2674      fixed by 4.65/MH/01 (is this a record?) are fixed:
2675
2676      (i)  An empty string was always treated as zero by the numeric comparison
2677           operators. This behaviour has been restored.
2678
2679      (ii) It is documented that the numeric comparison operators always treat
2680           their arguments as decimal numbers. This was broken in that numbers
2681           starting with 0 were being interpreted as octal.
2682
2683      While fixing these problems I realized that there was another issue that
2684      hadn't been noticed. Values of message_size_limit (both the global option
2685      and the transport option) were treated as octal if they started with 0.
2686      The documentation was vague. These values are now always treated as
2687      decimal, and I will make that clear in the documentation.
2688
2689
2690Exim version 4.65
2691-----------------
2692
2693TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2694      Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2695      versions. (#438)
2696
2697MH/01 Don't check that the operands of numeric comparison operators are
2698      integers when their expansion is in "skipping" mode (fixes bug
2699      introduced by 4.64-PH/07).
2700
2701PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2702      child addresses, Exim now panics and dies. Previously, because the count
2703      is held in a short int, deliveries were likely to be lost. As such a
2704      large number of recipients for a single message is ridiculous
2705      (performance will be very, very poor), I have chosen to impose a limit
2706      rather than extend the field.
2707
2708
2709Exim version 4.64
2710-----------------
2711
2712TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2713      leftover -K file (the existence of which was triggered by #402).
2714      While we were at it, introduced process PID as part of the -K
2715      filename. This should rule out race conditions when creating
2716      these files.
2717
2718TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2719      processing considerably. Previous code took too long for large mails,
2720      triggering a timeout which in turn triggers #401.
2721
2722TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2723      in the DK code in transports.c. sendfile() is not really portable,
2724      hence the _LINUX specificness.
2725
2726TF/01 In the add_headers option to the mail command in an Exim filter,
2727      there was a bug that Exim would claim a syntax error in any
2728      header after the first one which had an odd number of characters
2729      in the field name.
2730
2731PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2732      callout verification, Exim cached a "reject" for the entire domain. This
2733      is correct for most verifications, but it is not correct for a recipient
2734      verification with use_sender or use_postmaster set, because in that case
2735      the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2736      case of MAIL FROM:<> rejection from other early rejections (e.g.
2737      rejection of HELO). When verifying a recipient using a non-null MAIL
2738      address, the cache is ignored if it shows MAIL FROM:<> rejection.
2739      Whatever the result of the callout, the value of the domain cache is
2740      left unchanged (for any other kind of callout, getting as far as trying
2741      RCPT means that the domain itself is ok).
2742
2743PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2744      gcc 4.1.1 threw up.
2745
2746PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2747      manifest itself as EPIPE rather than ECONNECT. When tidying away a
2748      session, the daemon ignores ECONNECT errors and logs others; it now
2749      ignores EPIPE as well.
2750
2751PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2752      (quoted-printable decoding).
2753
2754PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2755      later the small subsequent patch to fix an introduced bug.
2756
2757PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2758
2759PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2760
2761PH/08 An error is now given if message_size_limit is specified negative.
2762
2763PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2764      to be given (somewhat) arbitrary names.
2765
2766JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2767      in 4.64-PH/09.
2768
2769JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2770      miscellaneous code fixes
2771
2772PH/10 Added the log_reject_target ACL modifier to specify where to log
2773      rejections.
2774
2775PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2776      hostname. This is wrong, because it relates to the incoming message (and
2777      probably the interface on which it is arriving) and not to the outgoing
2778      callout (which could be using a different interface). This has been
2779      changed to use the value of the helo_data option from the smtp transport
2780      instead - this is what is used when a message is actually being sent. If
2781      there is no remote transport (possible with a router that sets up host
2782      addresses), $smtp_active_hostname is used.
2783
2784PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2785      tweaks were necessary in order to get it to work (see also 21 below):
2786      (a) The code assumed that strncpy() returns a negative number on buffer
2787          overflow, which isn't the case. Replaced with Exim's string_format()
2788          function.
2789      (b) There were several signed/unsigned issues. I just did the minimum
2790          hacking in of casts. There is scope for a larger refactoring.
2791      (c) The code used strcasecmp() which is not a standard C function.
2792          Replaced with Exim's strcmpic() function.
2793      (d) The code set only $1; it now sets $auth1 as well.
2794      (e) A simple test gave the error "authentication client didn't specify
2795          service in request". It would seem that Dovecot has changed its
2796          interface. Fortunately there's a specification; I followed it and
2797          changed what the client sends and it appears to be working now.
2798
2799PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2800      decoding.
2801
2802PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2803      address A is aliased to B and C, where B exists and C does not. Without
2804      -v the output is "A verified" because verification stops after a
2805      successful redirection if more than one address is generated. However,
2806      with -v the child addresses are also verified. Exim was outputting "A
2807      failed to verify" and then showing the successful verification for C,
2808      with its parentage. It now outputs "B failed to verify", showing B's
2809      parentage before showing the successful verification of C.
2810
2811PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2812      look up a TXT record in a specific list after matching in a combined
2813      list.
2814
2815PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2816      RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2817      they consult the DNS. I had assumed they would set it the way they
2818      wanted; and indeed my experiments on Linux seem to show that in some
2819      cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2820      To be on the safe side, however, I have now made the interface to
2821      host_find_byname() similar to host_find_bydns(), with an argument
2822      containing the DNS resolver options. The host_find_byname() function now
2823      sets these options at its start, just as host_find_bydns() does. The smtp
2824      transport options dns_qualify_single and dns_search_parents are passed to
2825      host_find_byname() when gethostbyname=TRUE in this transport. Other uses
2826      of host_find_byname() use the default settings of RES_DEFNAMES
2827      (qualify_single) but not RES_DNSRCH (search_parents).
2828
2829PH/17 Applied (a modified version of) Nico Erfurth's patch to make
2830      spool_read_header() do less string testing, by means of a preliminary
2831      switch on the second character of optional "-foo" lines. (This is
2832      overdue, caused by the large number of possibilities that now exist.
2833      Originally there were few.) While I was there, I also converted the
2834      str(n)cmp tests so they don't re-test the leading "-" and the first
2835      character, in the hope this might squeeze out yet more improvement.
2836
2837PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
2838      flag allowing group syntax was set by the header_syntax check but not
2839      turned off, possible causing trouble later; (2) The flag was not being
2840      set at all for the header_verify test, causing "group"-style headers to
2841      be rejected. I have now set it in this case, and also caused header_
2842      verify to ignore an empty address taken from a group. While doing this, I
2843      came across some other cases where the code for allowing group syntax
2844      while scanning a header line wasn't quite right (mostly, not resetting
2845      the flag correctly in the right place). These bugs could have caused
2846      trouble for malformed header lines. I hope it is now all correct.
2847
2848PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
2849      with the "reply" argument non-NULL. The code, however (which originally
2850      came from elsewhere) had *some* tests for NULL when it wrote to *reply,
2851      but it didn't always do it. This confused somebody who was copying the
2852      code for some other use. I have removed all the tests.
2853
2854PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
2855      feature that was used to support insecure browsers during the U.S. crypto
2856      embargo. It requires special client support, and Exim is probably the
2857      only MTA that supported it -- and would never use it because real RSA is
2858      always available. This code has been removed, because it had the bad
2859      effect of slowing Exim down by computing (never used) parameters for the
2860      RSA_EXPORT functionality.
2861
2862PH/21 On the advice of Timo Sirainen, added a check to the dovecot
2863      authenticator to fail if there's a tab character in the incoming data
2864      (there should never be unless someone is messing about, as it's supposed
2865      to be base64-encoded). Also added, on Timo's advice, the "secured" option
2866      if the connection is using TLS or if the remote IP is the same as the
2867      local IP, and the "valid-client-cert option" if a client certificate has
2868      been verified.
2869
2870PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
2871      authenticators. This can be used for authorization after authentication
2872      succeeds. (In the case of plaintext, it servers for both authentication
2873      and authorization.)
2874
2875PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
2876      if any retry times were supplied.
2877
2878PH/24 Exim crashed if verify=helo was activated during an incoming -bs
2879      connection, where there is no client IP address to check. In this
2880      situation, the verify now always succeeds.
2881
2882PH/25 Applied John Jetmore's -Mset patch.
2883
2884PH/26 Added -bem to be like -Mset, but loading a message from a file.
2885
2886PH/27 In a string expansion for a processed (not raw) header when multiple
2887      headers of the same name were present, leading whitespace was being
2888      removed from all of them, but trailing whitespace was being removed only
2889      from the last one. Now trailing whitespace is removed from each header
2890      before concatenation. Completely empty headers in a concatenation (as
2891      before) are ignored.
2892
2893PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
2894      Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
2895
2896PH/29 [Removed. This was a change that I later backed out, and forgot to
2897      correct the ChangeLog entry (that I had efficiently created) before
2898      committing the later change.]
2899
2900PH/30 Exim was sometimes attempting to deliver messages that had suffered
2901      address errors (4xx response to RCPT) over the same connection as other
2902      messages routed to the same hosts. Such deliveries are always "forced",
2903      so retry times are not inspected. This resulted in far too many retries
2904      for the affected addresses. The effect occurred only when there were more
2905      hosts than the hosts_max_try setting in the smtp transport when it had
2906      the 4xx errors. Those hosts that it had tried were not added to the list
2907      of hosts for which the message was waiting, so if all were tried, there
2908      was no problem. Two fixes have been applied:
2909
2910      (i)  If there are any address or message errors in an SMTP delivery, none
2911           of the hosts (tried or untried) are now added to the list of hosts
2912           for which the message is waiting, so the message should not be a
2913           candidate for sending over the same connection that was used for a
2914           successful delivery of some other message. This seems entirely
2915           reasonable: after all the message is NOT "waiting for some host".
2916           This is so "obvious" that I'm not sure why it wasn't done
2917           previously. Hope I haven't missed anything, but it can't do any
2918           harm, as the worst effect is to miss an optimization.
2919
2920      (ii) If, despite (i), such a delivery is accidentally attempted, the
2921           routing retry time is respected, so at least it doesn't keep
2922           hammering the server.
2923
2924PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
2925      in ${readsocket because some servers need this prod.
2926
2927PH/32 Added some extra debug output when updating a wait-xxx database.
2928
2929PH/33 The hint "could be header name not terminated by colon", which has been
2930      given for certain expansion errors for a long time, was not being given
2931      for the ${if def:h_colon_omitted{...  case.
2932
2933PH/34 The spec says: "With one important exception, whenever a domain list is
2934      being scanned, $domain contains the subject domain." There was at least
2935      one case where this was not true.
2936
2937PH/35 The error "getsockname() failed: connection reset by peer" was being
2938      written to the panic log as well as the main log, but it isn't really
2939      panic-worthy as it just means the connection died rather early on. I have
2940      removed the panic log writing for the ECONNRESET error when getsockname()
2941      fails.
2942
2943PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
2944      runs only) independently of the message's sender address. This meant
2945      that, if the 4xx error was in fact related to the sender, a different
2946      message to the same recipient with a different sender could confuse
2947      things. In particular, this can happen when sending to a greylisting
2948      server, but other circumstances could also provoke similar problems.
2949      I have changed the default so that the retry time for these errors is now
2950      based a combination of the sender and recipient addresses. This change
2951      can be overridden by setting address_retry_include_sender=false in the
2952      smtp transport.
2953
2954PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
2955      remote server are returned as part of bounce messages. This was not
2956      happening for LMTP over a pipe (the lmtp transport), but now it is the
2957      same for both kinds of LMTP.
2958
2959PH/38 Despite being documented as not happening, Exim was rewriting addresses
2960      in header lines that were in fact CNAMEs. This is no longer the case.
2961
2962PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
2963      and queue runs started by the daemon processed all messages. This has
2964      been fixed so that -R and -S can now usefully be given with -q<time>.
2965
2966PH/40 Import PCRE release 6.7 (fixes some bugs).
2967
2968PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
2969
2970PH/42 Give an error if -q is specified more than once.
2971
2972PH/43 Renamed the variables $interface_address and $interface_port as
2973      $received_ip_address and $received_port, to make it clear that these
2974      values apply to message reception, and not to the outgoing interface when
2975      a message is delivered. (The old names remain recognized, of course.)
2976
2977PH/44 There was no timeout on the connect() call when using a Unix domain
2978      socket in the ${readsocket expansion. There now is.
2979
2980PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
2981      be meaningful with "accept".
2982
2983SC/01 Eximstats V1.43
2984     Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
2985
2986SC/02 Eximstats V1.44
2987      Use a glob alias rather than an array ref in the generated
2988      parser. This improves both readability and performance.
2989
2990SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
2991      Collect SpamAssassin and rejection statistics.
2992      Don't display local sender or destination tables unless
2993      there is data to show.
2994      Added average volumes into the top table text output.
2995
2996SC/04 Eximstats V1.46
2997      Collect data on the number of addresses (recipients)
2998      as well as the number of messages.
2999
3000SC/05 Eximstats V1.47
3001      Added 'Message too big' to the list of mail rejection
3002      reasons (thanks to Marco Gaiarin).
3003
3004SC/06 Eximstats V1.48
3005      Mainlog lines which have GMT offsets and are too short to
3006      have a flag are now skipped.
3007
3008SC/07 Eximstats V1.49 (Alain Williams)
3009      Added the -emptyok flag.
3010
3011SC/08 Eximstats V1.50
3012      Fixes for obtaining the IP address from reject messages.
3013
3014JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3015      (added [br]h_ prefixes, implemented RFC2047 decoding.  Fixed
3016      whitespace changes from 4.64-PH/27
3017
3018JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3019      match 4.64-PH/13
3020
3021JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3022      are found, allow negative numbers in numeric criteria)
3023
3024JJ/06 exipick.20061117.2, added new $message_body_missing variable
3025
3026JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3027      to match changes made in 4.64-PH/43
3028
3029PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3030
3031PH/47 Put in an explicit test for a DNS lookup of an address record where the
3032      "domain" is actually an IP address, and force a failure. This locks out
3033      those revolvers/nameservers that support "A-for-A" lookups, in
3034      contravention of the specifications.
3035
3036PH/48 When a host name was looked up from an IP address, and the subsequent
3037      forward lookup of the name timed out, the host name was left in
3038      $sender_host_name, contrary to the specification.
3039
3040PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3041      restricted to single-key lookups, Exim was not diagnosing an error if
3042      * or *@ was used with a query-style lookup.
3043
3044PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3045
3046MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3047      long ago, but noone interested enough thought of it. Let's just say that
3048      the "1.1" means that there are some new functions that weren't there at
3049      some point in the past.
3050
3051PH/51 Error processing for expansion failure of helo_data from an smtp
3052      transport during callout processing was broken.
3053
3054PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3055      tested/used via the -bh/-bhc/-bs options.
3056
3057PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3058      bug, fixed in subsequent PCRE releases).
3059
3060PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3061      arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3062
3063PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3064
3065
3066Exim version 4.63
3067-----------------
3068
3069SC/01 Use a glob alias rather than an array ref in eximstats generated
3070      parser. This improves both readability and performance.
3071
3072SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3073      Don't display local sender or destination tables in eximstats unless
3074      there is data to show.
3075      Added average volumes into the eximstats top table text output.
3076
3077SC/03 Collect data on the number of addresses (recipients) as well
3078      as the number of messages in eximstats.
3079
3080TF/01 Correct an error in the documentation for the redirect router. Exim
3081      does (usually) call initgroups() when daemonizing.
3082
3083TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3084      with consistent privilege compared to when running as a daemon.
3085
3086TF/03 Note in the spec that $authenticated_id is not set for local
3087      submissions from trusted users.
3088
3089TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3090      Thanks to Dean Brooks <dean@iglou.com> for the patch.
3091
3092TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3093      by adding some example configuration directives to the default
3094      configuration file. A little bit of work is required to uncomment the
3095      directives and define how usernames and passwords are checked, but
3096      there is now a framework to start from.
3097
3098PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3099      functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3100      without this. I don't know how relevant this is to other LDAP libraries.
3101
3102PH/02 Add the verb name to the "unknown ACL verb" error.
3103
3104PH/03 Magnus Holmgren's patch for filter_prepend_home.
3105
3106PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3107
3108PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3109      directory not expanded when it should be if an expanded home directory
3110      was set for the address (which is overridden by the transport).
3111
3112PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3113      libradius.
3114
3115PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3116      bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3117      because it is too late at that time, and has no effect.
3118
3119PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3120      security issue with \' (bugzilla #107). I could not use the
3121      PQescapeStringConn() function, because it needs a PGconn value as one of
3122      its arguments.
3123
3124PH/08 When testing addresses using -bt, indicate those final addresses that
3125      are duplicates that would not cause an additional delivery. At least one
3126      person was confused, thinking that -bt output corresponded to deliveries.
3127      (Suppressing duplicates isn't a good idea as you lose the information
3128      about possibly different redirections that led to the duplicates.)
3129
3130PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3131      systems where poll() doesn't work, in particular OS X.
3132
3133PH/10 Added more information to debugging output for retry time not reached.
3134
3135PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3136      operations in malware.c.
3137
3138PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3139      signatures.
3140
3141PH/13 If write_rejectlog was set false when logging was sent to syslog with
3142      syslog_duplication set false, log lines that would normally be written
3143      both the the main log and to the reject log were not written to syslog at
3144      all.
3145
3146PH/14 In the default configuration, change the use of "message" in ACL warn
3147      statements to "add_header".
3148
3149PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3150      not followed by a command (e.g. "seen endif").
3151
3152PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3153      and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3154      latter.
3155
3156PH/17 Added extra conditions to the default value of delay_warning_condition
3157      so that it is now:
3158
3159        ${if or { \
3160            { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3161            { match{$h_precedence:}{(?i)bulk|list|junk} } \
3162            { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3163            }{no}{yes}}
3164
3165      The Auto-Submitted: and various List- headers are standardised, whereas I
3166      don't think Precedence: ever was.
3167
3168PH/18 Refactored debugging code in route_finduser() to show more information,
3169      in particular, the error code if getpwnam() issues one.
3170
3171PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3172      This is apparently needed in addition to the PH/07 change above to avoid
3173      any possible encoding problems.
3174
3175PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3176      but not after initializing Perl.
3177
3178PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3179      output them only if debugging. By default they are written stderr,
3180      apparently, which is not desirable.
3181
3182PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3183      queries.
3184
3185JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3186      --not options
3187
3188JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3189
3190PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3191      authenticated or an ident call has been made. Suppress the default
3192      values for $authenticated_id and $authenticated_sender (but permit -oMai
3193      and -oMas) when testing with -bh.
3194
3195PH/24 Re-jigged the order of the tests in the default configuration so that the
3196      tests for valid domains and recipients precede the DNS black list and CSA
3197      tests, on the grounds that those ones are more expensive.
3198
3199PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3200      that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3201      This bug exists in every version of Exim that I still have, right back to
3202      0.12.
3203
3204PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3205      However, an attempt to turn on case-sensitivity in a regex key by
3206      including (?-i) didn't work because the subject string was already
3207      lowercased, and the effects were non-intuitive. It turns out that a
3208      one-line patch can be used to allow (?-i) to work as expected.
3209
3210
3211Exim version 4.62
3212-----------------
3213
3214TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3215      other effects) broke the use of negated acl sub-conditions.
3216
3217PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3218      patch).
3219
3220PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3221      "Deny" causes Exim to reject the incoming connection with a 554 error.
3222      Unfortunately, if there is a major crisis, such as a disk failure,
3223      tcp-wrappers gives "deny", whereas what one would like would be some
3224      kind of temporary error. A kludge has been added to help with this.
3225      Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3226      554 error is used if errno is still zero or contains ENOENT (which occurs
3227      if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3228      451 error is used.
3229
3230PH/03 Add -lutil to the default FreeBSD LIBS setting.
3231
3232PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3233      errors. Otherwise a message that provokes a temporary error (when other
3234      messages do not) can cause a whole host to time out.
3235
3236PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3237      addresses were routed directly to files or pipes from a redirect router.
3238      File deliveries just didn't batch; pipe deliveries might have suffered
3239      odd errors.
3240
3241PH/06 A failure to get a lock for a hints database would erroneously always say
3242      "Failed to get write lock", even when it was really a read lock.
3243
3244PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3245      of 0600. This has been changed to use the value of the lockfile_mode
3246      option (which defaults to 0600).
3247
3248PH/08 Applied small patch from the Sieve maintainer.
3249
3250PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3251      folder from quota calculations, a direct delivery into this folder messed
3252      up the contents of the maildirsize file. This was because the regex was
3253      used only to exclude .Trash (or whatever) when the size of the mailbox
3254      was calculated. There was no check that a delivery was happening into an
3255      excluded directory. This bug has been fixed by ignoring all quota
3256      processing for deliveries into excluded directories.
3257
3258PH/10 Added the maildirfolder_create_regex option to appendfile.
3259
3260
3261Exim version 4.61
3262-----------------
3263
3264PH/01 The code for finding all the local interface addresses on a FreeBSD
3265      system running IPv6 was broken. This may well have applied to all BSD
3266      systems, as well as to others that have similar system calls. The broken
3267      code found IPv4 interfaces correctly, but gave incorrect values for the
3268      IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3269      that it would not match correctly against @[] and not recognize the IPv6
3270      addresses as local.
3271
3272PH/02 The ipliteral router was not recognizing addresses of the form user@
3273      [ipv6:....] because it didn't know about the "ipv6:" prefix.
3274
3275PH/03 Added disable_ipv6.
3276
3277PH/04 Changed $reply_address to use the raw form of the headers instead of the
3278      decoded form, because it is most often used to construct To: headers
3279      lines in autoreplies, and the decoded form may well be syntactically
3280      invalid. However, $reply_address has leading white space removed, and all
3281      newlines turned into spaces so that the autoreply transport does not
3282      grumble.
3283
3284PH/05 If group was specified without a user on a router, and no group or user
3285      was specified on a transport, the group from the router was ignored.
3286
3287PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3288      for visible compile-time settings that can be used to change these
3289      numbers, for those that want even more. Backwards compatibility with old
3290      spool files has been maintained. However, going back to a previous Exim
3291      release will lost any variables that are in spool files.
3292
3293PH/07 Two small changes when running in the test harness: increase delay when
3294      passing a TCP/IP connection to a new process, in case the original
3295      process has to generate a bounce, and remove special handling of
3296      127.0.0.2 (sic), which is no longer necessary.
3297
3298PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3299      be the same on different OS.
3300
3301PH/09 Moved a debug statement in filter processing to avoid a race problem when
3302      testing.
3303
3304JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3305      whether --show-vars was specified or not
3306
3307JJ/02 exipick: Added support for new ACL variable spool format introduced
3308      in 4.61-PH/06
3309
3310PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3311      syntactically invalid From: or Reply-to: line, and a filter used this to
3312      generate an autoreply, and therefore failed to obtain an address for the
3313      autoreply, Exim could try to deliver to a non-existent relative file
3314      name, causing unrelated and misleading errors. What now happens is that
3315      it logs this as a hard delivery error, but does not attempt to create a
3316      bounce message.
3317
3318PH/11 The exinext utility has a -C option for testing purposes, but although
3319      the given file was scanned by exinext itself; it wasn't being passed on
3320      when Exim was called.
3321
3322PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3323      an end-of-file indication when reading a command response.
3324
3325PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3326      compiled. In many other places in Exim, IPv6 addresses are always
3327      recognized, so I have changed this. It also means that IPv4 domain
3328      literals of the form [IPV4:n.n.n.n] are now always recognized.
3329
3330PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3331      used if the router is not running as root, for example, when verifying at
3332      ACL time, or when using -bh. The debugging output from this situation was
3333      non-existent - all you got was a failure to exec. I have made two
3334      changes:
3335
3336      (a) Failures to set uid/gid, the current directory, or a process leader
3337          in a subprocess such as that created by queryprogram now generate
3338          suitable debugging output when -d is set.
3339
3340      (b) The queryprogram router detects when it is not running as root,
3341          outputs suitable debugging information if -d is set, and then runs
3342          the subprocess without attempting to change uid/gid.
3343
3344PH/15 Minor change to Makefile for building test_host (undocumented testing
3345      feature).
3346
3347PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3348      additional section of a DNS packet that returns MX or SRV records.
3349      Instead, it always explicitly searches for A/AAAA records. This avoids
3350      major problems that occur when a DNS server includes only records of one
3351      type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3352      fixed another bug: if SRV records were looked up and the corresponding
3353      address records were *not* found in the additional section, the port
3354      values from the SRV records were lost.
3355
3356PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3357      using the correct key (the original address) when searching the retry
3358      rules in order to find which one to use for generating the retry hint.
3359
3360PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3361      adding the default one. Similarly, if it contains a Reply-To: header, the
3362      errors_reply_to option, if set, is not used.
3363
3364PH/19 When calculating a retry time, Exim used to measure the "time since
3365      failure" by looking at the "first failed" field in the retry record. Now
3366      it does not use this if it is later than than the arrival time of the
3367      message. Instead it uses the arrival time. This makes for better
3368      behaviour in cases where some deliveries succeed, thus re-setting the
3369      "first failed" field. An example is a quota failure for a huge message
3370      when small messages continue to be delivered. Without this change, the
3371      "time since failure" will always be short, possible causing more frequent
3372      delivery attempts for the huge message than are intended.
3373      [Note: This change was subsequently modified - see PH/04 for 4.62.]
3374
3375PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3376      $1, $2, $3) because the numerical variables can be reset during some
3377      expansion items (e.g. "match"), thereby losing the authentication data.
3378
3379PH/21 Make -bV show the size of off_t variables so that the test suite can
3380      decide whether to run tests for quotas > 2G.
3381
3382PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3383      mailbox_size, and mailbox_filecount in the appendfile transport. If a
3384      filecount value is greater than 2G or if a quota value is greater than 2G
3385      on a system where the size of off_t is not greater than 4, a panic error
3386      is given.
3387
3388PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3389      never match. The debug and -bh output now contains an explicit error
3390      message indicating a malformed IPv4 address or mask.
3391
3392PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3393      1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3394      PH/23 above applies.
3395
3396PH/25 Do not write to syslog when running in the test harness. The only
3397      occasion when this arises is a failure to open the main or panic logs
3398      (for which there is an explicit test).
3399
3400PH/26 Added the /no_tell option to "control=freeze".
3401
3402PH/27 If a host name lookup failed very early in a connection, for example, if
3403      the IP address matched host_lookup and the reverse lookup yielded a name
3404      that did not have a forward lookup, an error message of the form "no IP
3405      address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3406      could be logged. Now it outputs the IP address instead of "NULL".
3407
3408PH/28 An enabling patch from MH: add new function child_open_exim2() which
3409      allows the sender and the authenticated sender to be set when
3410      submitting a message from within Exim. Since child_open_exim() is
3411      documented for local_scan(), the new function should be too.
3412
3413PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3414      ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3415      results in an empty string is now treated as unset.
3416
3417PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3418
3419PH/31 Added sender_verify_fail logging option.
3420
3421PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3422      needed by RFC 822 but not by RFC 2822 was commented out. I have now
3423      tidied the source and removed it altogether.
3424
3425PH/33 When a queue run was abandoned because the load average was too high, a
3426      log line was always written; now it is written only if the queue_run log
3427      selector is set. In addition, the log line for abandonment now contains
3428      information about the queue run such as the pid. This is always present
3429      in "start" and "stop" lines but was omitted from the "abandon" line.
3430
3431PH/34 Omit spaces between a header name and the colon in the error message that
3432      is given when verify = headers_syntax fails (if there are lots of them,
3433      the message gets confusing).
3434
3435PH/35 Change the default for dns_check_names_pattern to allow slashes within
3436      names, as there are now some PTR records that contain slashes. This check
3437      is only to protect against broken name servers that fall over on strange
3438      characters, so the fact that it applies to all lookups doesn't matter.
3439
3440PH/36 Now that the new test suite is complete, we can remove some of the
3441      special code in Exim that was needed for the old test suite. For example,
3442      sorting DNS records because real resolvers return them in an arbitrary
3443      order. The new test suite's fake resolver always returns records in the
3444      same order.
3445
3446PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3447      bounces) except when queue_only is set, to avoid logging races between
3448      the different processes.
3449
3450PH/38 Panic-die if .include specifies a non-absolute path.
3451
3452PH/39 A tweak to the "H" retry rule from its user.
3453
3454JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3455      a label.  They prevented compilation on older perls.
3456
3457JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3458      a warning to be raised on newish perls.
3459
3460JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3461      on queue.  Changes to match documented behaviour of showing count of
3462      messages matching specified criteria.
3463
3464PH/40 Changed the default ident timeout from 30s to 5s.
3465
3466PH/41 Added support for the use of login_cap features, on those BSD systems
3467      that have them, for controlling the resources used by pipe deliveries.
3468
3469PH/42 The content-scanning code uses fopen() to create files in which to put
3470      message data. Previously it was not paying any attention to the mode of
3471      the files. Exim runs with umask(0) because the rest of the code creates
3472      files with open(), and sets the required mode explicitly. Thus, these
3473      files were ending up world-writeable. This was not a big issue, because,
3474      being within the spool directory, they were not world-accessible. I have
3475      created a function called modefopen, which takes an additional mode
3476      argument. It sets umask(777), creates the file, chmods it to the required
3477      mode, then resets the umask. All the relevant calls to fopen() in the
3478      content scanning code have been changed to use this function.
3479
3480PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3481      to 24 hours. This avoids potential overflow problems when processing G
3482      and H retry rules. I suspect nobody ever tinkers with this value.
3483
3484PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3485
3486PH/45 When the plaintext authenticator is running as a client, the server's
3487      challenges are checked to ensure they are valid base64 strings. By
3488      default, the authentication attempt is cancelled if an invalid string is
3489      received. Setting client_ignore_invalid_base64 true ignores these errors.
3490      The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3491      they are received. Thus, the responses can be made to depend on the
3492      challenges. If an invalid string is ignored, an empty string is placed in
3493      the variable.
3494
3495PH/46 Messages that are created by the autoreply transport now contains a
3496      References: header, in accordance with RFCs 2822 and 3834.
3497
3498PH/47 Added authenticated_sender_force to the smtp transport.
3499
3500PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3501
3502PH/49 Installed latest patch from the Sieve maintainer.
3503
3504PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3505      was also set, the appendfile transport was unnecessarily scanning a
3506      directory of message files (e.g. for maildir delivery) to find the count
3507      of files (along with the size), even though it did not need this
3508      information. It now does the scan only if it needs to find either the
3509      size of the count of files.
3510
3511PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3512
3513PH/52 Two bugs concerned with error handling when the smtp transport is
3514      used in LMTP mode:
3515
3516      (i) Exim was not creating retry information for temporary errors given
3517      for individual recipients after the DATA command when the smtp transport
3518      was used in LMTP mode. This meant that they could be retried too
3519      frequently, and not timed out correctly.
3520
3521      (ii) Exim was setting the flag that allows error details to be returned
3522      for LMTP errors on RCPT commands, but not for LMTP errors for individual
3523      recipients that were returned after the DATA command.
3524
3525PH/53 This is related to PH/52, but is more general: for any failing address,
3526      when detailed error information was permitted to be returned to the
3527      sender, but the error was temporary, then after the final timeout, only
3528      "retry timeout exceeded" was returned. Now it returns the full error as
3529      well as "retry timeout exceeded".
3530
3531PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3532      do this, and (what is worse) MTAs that accept it.
3533
3534PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3535      will now be deprecated.
3536
3537PH/56 New os.c-cygwin from the Cygwin maintainer.
3538
3539JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3540      formats (previously only available in exim formats via -bpr, -bpru,
3541      and -bpra.  Now also available in native and exiqgrep formats)
3542
3543JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3544      with very large, slow to parse queues
3545
3546JJ/08 exipick: added ! as generic prefix to negate any criteria format
3547
3548JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3549
3550PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3551      responses to authentication challenges, though it was showing the
3552      challenges; (ii) I've removed the CR characters from the debug output for
3553      SMTP output lines.
3554
3555PH/58 Allow for the insertion of a newline as well as a space when a string
3556      is turned into more than one encoded-word during RFC 2047 encoding. The
3557      Sieve code now uses this.
3558
3559PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3560      data_4xx, lost_connection, tls_required.
3561
3562PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3563      message was being sent as an SMTP response.
3564
3565PH/61 Add -l and -k options to exicyclog.
3566
3567PH/62 When verifying, if an address was redirected to one new address, so that
3568      verification continued, and the new address failed or deferred after
3569      having set something in $address_data, the value of $address_data was not
3570      passed back to the ACL. This was different to the case when no
3571      redirection occurred. The value is now passed back in both cases.
3572
3573PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3574      HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3575      use login_cap.h, so on its own it isn't the distinguishing feature. The
3576      new name refers directly to the setclassresources() function.
3577
3578PH/65 Added configuration files for NetBSD3.
3579
3580PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3581
3582PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3583      is preferred over IPv4.
3584
3585PH/68 The bounce_return_message and bounce_return_body options were not being
3586      honoured for bounces generated during the reception of non-SMTP messages.
3587      In particular, this applied to messages rejected by the ACL. This bug has
3588      been fixed. However, if bounce_return_message is true and bounce_return_
3589      body is false, the headers that are returned for a non-SMTP message
3590      include only those that have been read before the error was detected.
3591      (In the case of an ACL rejection, they have all been read.)
3592
3593PH/69 The HTML version of the specification is now built in a directory called
3594      spec_html instead of spec.html, because the latter looks like a path with
3595      a MIME-type, and this confuses some software.
3596
3597PH/70 Catch two compiler warnings in sieve.c.
3598
3599PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3600      function verify_get_ident() calls ip_connect() to connect a socket, but
3601      if the "connect()" function timed out, ip_connect() used to close the
3602      socket. However, verify_get_ident() also closes the socket later, and in
3603      between Exim writes to the log, which may get opened at this point. When
3604      the socket was closed in ip_connect(), the log could get the same file
3605      descriptor number as the socket. This naturally causes chaos. The fix is
3606      not to close the socket in ip_connect(); the socket should be closed by
3607      the function that creates it. There was only one place in the code where
3608      this was missing, in the iplookup router, which I don't think anybody now
3609      uses, but I've fixed it anyway.
3610
3611PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3612      well as to direct DNS lookups. Otherwise the handling of names in host
3613      lists is inconsistent and therefore confusing.
3614
3615
3616Exim version 4.60
3617-----------------
3618
3619PH/01 Two changes to the default runtime configuration:
3620
3621      (1) Move the checks for relay_from_hosts and authenticated clients from
3622          after to before the (commented out) DNS black list checks.
3623
3624      (2) Add control=submission to the relay_from_hosts and authenticated
3625          clients checks, on the grounds that messages accepted by these
3626          statements are most likely to be submissions.
3627
3628PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3629
3630      (1) Generate an error if the third argument for the ${prvs expansion is
3631          not a single digit.
3632
3633      (2) Treat a missing third argument of ${prvscheck as if it were an empty
3634          string.
3635
3636      (3) Reset the variables that are obtained from the first argument of
3637          ${prvscheck and used in the second argument before leaving the code,
3638          because their memory is reclaimed, so using them afterwards may do
3639          silly things.
3640
3641      (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3642          one (it's much easier than Tom thought :-).
3643
3644      (5) Because of (4), we can now allow for the use of $prvscheck_result
3645          inside the third argument.
3646
3647PH/03 For some reason, the default setting of PATH when running a command from
3648      a pipe transport was just "/usr/bin". I have changed it to
3649      "/bin:/usr/bin".
3650
3651PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3652      anything to be listed in the output from -bV.
3653
3654PH/05 When a filter generated an autoreply, the entire To: header line was
3655      quoted in the delivery log line, like this:
3656
3657        => >A.N.Other <ano@some.domain> <original@ddress> ...
3658
3659      This has been changed so that it extracts the operative address. There
3660      may be more than one such address. If so, they are comma-separated, like
3661      this:
3662
3663        => >ano@some.domain,ona@other.domain <original@ddress> ...
3664
3665PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3666      command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3667      not being looked up in the rDNS to get a host name, Exim was showing the
3668      IP address twice in Received: lines, even though the IP addresses were
3669      identical. For example:
3670
3671        Received: from [1.2.3.4] (helo=[1.2.3.4])
3672
3673      However, if the real host name was known, it was omitting the HELO data
3674      if it matched the actual IP address. This has been tidied up so that it
3675      doesn't show the same IP address twice.
3676
3677PH/07 When both +timestamp and +memory debugging was on, the value given by
3678      $tod_xxx expansions could be wrong, because the tod_stamp() function was
3679      called by the debug printing, thereby overwriting the timestamp buffer.
3680      Debugging no longer uses the tod_stamp() function when +timestamp is set.
3681
3682PH/08 When the original message was included in an autoreply transport, it
3683      always said "this is a copy of the message, including all the headers",
3684      even if body_only or headers_only was set. It now gives an appropriate
3685      message.
3686
3687PH/09 Applied a patch from the Sieve maintainer which:
3688
3689      o  fixes some comments
3690      o  adds the (disabled) notify extension core
3691      o  adds some debug output for the result of if/elsif tests
3692      o  points to the current vacation draft in the documentation
3693         and documents the missing references header update
3694
3695      and most important:
3696
3697      o  fixes a bug in processing the envelope test (when testing
3698         multiple envelope elements, the last element determined the
3699         result)
3700
3701PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3702      Electronic Mail") by including:
3703
3704        Auto-submitted: auto-generated
3705
3706      in the messages that it generates (bounce messages and others, such as
3707      warnings). In the case of bounce messages for non-SMTP messages, there was
3708      also a typo: it was using "Auto_submitted" (underscore instead of
3709      hyphen). Since every message generated by Exim is necessarily in response
3710      to another message, thes have all been changed to:
3711
3712        Auto-Submitted: auto-replied
3713
3714      in accordance with these statements in the RFC:
3715
3716        The auto-replied keyword:
3717
3718        -  SHOULD be used on messages sent in direct response to another
3719           message by an automatic process,
3720
3721        -  MUST NOT be used on manually-generated messages,
3722
3723        -  MAY be used on Delivery Status Notifications (DSNs) and Message
3724           Disposition Notifications (MDNs),
3725
3726        -  MUST NOT be used on messages generated by automatic or periodic
3727           processes, except for messages which are automatic responses to
3728           other messages.
3729
3730PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3731      to the default Received: header definition.
3732
3733PH/12 Added log selector acl_warn_skipped (default on).
3734
3735PH/13 After a successful wildlsearch lookup, discard the values of numeric
3736      variables because (a) they are in the wrong storage pool and (b) even if
3737      they were copied, it wouldn't work properly because of the caching.
3738
3739PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3740      checking when decoding. Apparently there are clients that generate
3741      overlong encoded strings. Why am I not surprised?
3742
3743PH/15 If the first argument of "${if match_address" was not empty, but did not
3744      contain an "@" character, Exim crashed. Now it writes a panic log message
3745      and treats the condition as false.
3746
3747PH/16 In autoreply, treat an empty string for "once" the same as unset.
3748
3749PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3750      extension "envelope-auth".  The code is finished and in agreement with
3751      other implementations, but there is no documentation so far and in fact,
3752      nobody wrote the draft yet.  This extension is currently #undef'ed, thus
3753      not changing the active code.
3754
3755      Print executed "if" and "elsif" statements when debugging is used. This
3756      helps a great deal to understand what a filter does.
3757
3758      Document more things not specified clearly in RFC3028.  I had all this
3759      sorted out, when out of a sudden new issues came to my mind.  Oops."
3760
3761PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3762      (Bugzilla #53).
3763
3764PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3765      canonical form (as documented). However, after a host name lookup from
3766      the IP address, check_host() was doing a simple string comparison with
3767      addresses acquired from the DNS when checking that the found name did
3768      have the original IP as one of its addresses. Since any found IPv6
3769      addresses are likely to be in abbreviated form, the comparison could
3770      fail. Luckily, there already exists a function for doing the comparison
3771      by converting both addresses to binary, so now that is used instead of
3772      the text comparison.
3773
3774PH/20 There was another similar case to PH/19, when a complete host name was
3775      given in a host list; looking up its IP address could give an abbreviated
3776      form, whereas the current host's name might or might not be abbreviated.
3777      The same fix has been applied.
3778
3779
3780Exim version 4.54
3781-----------------
3782
3783PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3784      set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3785      It now does.
3786
3787PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3788      the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3789
3790PH/03 Typo: missing ".o" in src/pcre/Makefile.
3791
3792PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3793      header line, restrict the check to what is listed in RFCs 2369 and 2929.
3794      Also, for "Auto-Submitted", treat anything other than "no" as
3795      non-personal, in accordance with RFC 3834. (Previously it treated
3796      anything starting "auto-" as non-personal.)
3797
3798TF/01 The control=submission/name=... option had a problem with syntax
3799      errors if the name included a slash character. The /name= option
3800      now slurps the rest of the string, so it can include any characters
3801      but it must come last in the list of options (after /sender_retain
3802      or /domain=).
3803
3804PH/05 Some modifications to the interface to the fake nameserver for the new
3805      testing suite.
3806
3807
3808
3809Exim version 4.53
3810-----------------
3811
3812TK/01 Added the "success_on_redirect" address verification option. See
3813      NewStuff for rationale and an example.
3814
3815PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3816
3817PH/02 Patch to exigrep to allow it to work on syslog lines.
3818
3819PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3820      fread() to skip over the body file's header line, because in Cygwin the
3821      header line is locked and is inaccessible.
3822
3823PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
3824      co-exist for some time) to make it clear that it is the Exim ID that is
3825      referenced, not the Message-ID: header line.
3826
3827PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
3828      string_format() function, because snprintf() does not exist on all
3829      operating systems.
3830
3831PH/06 The use of forbid_filter_existstest now also locks out the use of the
3832      ${stat: expansion item.
3833
3834PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
3835      protocol synchronization error", to keep the pedants happy.
3836
3837PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
3838      well as for IRIX systems, when gcc is being used. See the host.c source
3839      file for comments.
3840
3841PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
3842
3843PH/10 Named domain lists were not working if used in a queue_smtp_domains
3844      setting.
3845
3846PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
3847      transport and to the smtp transport in LMTP mode.
3848
3849TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
3850
3851PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
3852      run a filter in a subprocess. This could lead to confusion in subsequent
3853      lookups in the parent process. There should also be a search_tidyup() at
3854      the end of the subprocess.
3855
3856PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
3857      only if the host matched helo_try_verify_hosts, which caused the
3858      verification to occur when the EHLO/HELO command was issued. The ACL just
3859      tested the remembered result. Now, if a previous verification attempt has
3860      not happened, "verify = helo" does it there and then.
3861
3862JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
3863
3864TK/03 Fix log output including CR from clamd.
3865
3866PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
3867      exist provoked a memory error which could cause a segfault.
3868
3869PH/15 Installed PCRE 6.2
3870
3871PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
3872
3873PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
3874      of the problem. Specifically, suggested +O2 rather than +O1 for the
3875      HP-UX compiler.
3876
3877PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
3878
3879PH/20 If a delivery was routed to a non-standard port by means of an SRV
3880      record, the port was not correctly logged when the outgoing_port log
3881      selector was set (it logged the transort's default port).
3882
3883PH/21 Added support for host-specific ports to manualroute, queryprogram,
3884      fallback_hosts, and "hosts" in the smtp transport.
3885
3886PH/22 If the log selector "outgoing_port" is set, the port is now also given on
3887      host errors such as "Connection refused".
3888
3889PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
3890      authentication with radiusclient 0.4.9:
3891
3892      - Error returned from rc_read_config was caught wrongly
3893      - Username/password not passed on to radius server due to wrong length.
3894
3895      The presumption is that some radiusclient API changes for 4.51/PH/17
3896      were not taken care of correctly. The code is still untested by me (my
3897      Linux distribution still has 0.3.2 of radiusclient), but it was
3898      contributed by a Radius user.
3899
3900PH/24 When doing a callout, the value of $domain wasn't set correctly when
3901      expanding the "port" option of the smtp transport.
3902
3903TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
3904      while reading a MIME header. Thanks to Tom Hughes for a patch.
3905
3906PH/24 Include config.h inside local_scan.h so that configuration settings are
3907      available.
3908
3909PH/25 Make $smtp_command_argument available after all SMTP commands. This means
3910      that in an ACL for RCPT (for example), you can examine exactly what was
3911      received.
3912
3913PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
3914      commands, but it was not correctly comparing the address with the actual
3915      client host address. Thus, it would show the EHLO address in Received:
3916      header lines when this was not necessary.
3917
3918PH/27 Added the % operator to ${eval:}.
3919
3920PH/28 Exim tries to create and chdir to its spool directory when it starts;
3921      it should be ignoring failures (because with -C, for example, it has lost
3922      privilege). It wasn't ignoring creation failures other than "already
3923      exists".
3924
3925PH/29 Added "crypteq" to the list of supported features that Exim outputs when
3926      -bV or -d is used.
3927
3928PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
3929      because an input line was too long, either on its own, or by virtue of
3930      too many continuations, the temporary file was not being removed, and the
3931      return code was incorrect.
3932
3933PH/31 Missing "BOOL" in function definition in filtertest.c.
3934
3935PH/32 Applied Sieve patches from the maintainer.
3936
3937TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
3938
3939PH/33 Added "verify = not_blind".
3940
3941PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
3942      Local/Makefile (with some defaults set). These are used in built scripts
3943      such as exicyclog, but they have never been used in the exim_install
3944      script (though there are many overriding facilities there). I have
3945      arranged that the exim_install script now takes note of these two
3946      settings.
3947
3948PH/35 Installed configuration files for Dragonfly.
3949
3950PH/36 When a locally submitted message by a trusted user did not contain a
3951      From: header, and the sender address was obtained from -f or from an SMTP
3952      MAIL command, and the trusted user did not use -F to supply a sender
3953      name, $originator_name was incorrectly used when constructing a From:
3954      header. Furthermore, $originator_name was used for submission mode
3955      messages from external hosts without From: headers in a similar way,
3956      which is clearly wrong.
3957
3958PH/37 Added control=suppress_local_fixups.
3959
3960PH/38 When log_selector = +received_sender was set, and the addition of the
3961      sender made the log line's construction buffer exactly full, or one byte
3962      less than full, an overflow happened when the terminating "\n" was
3963      subsequently added.
3964
3965PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
3966      when the result of a list match is failure because a DNS lookup failed.
3967
3968PH/40 RM_COMMAND is now used in the building process.
3969
3970PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
3971      the "build-* directories that it finds.
3972
3973PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
3974      address in a domain literal was a prefix of an interface address.
3975
3976PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
3977      when verifying a sender address, unless rewrite_headers is false.
3978
3979PH/44 Wrote a long comment about why errors_to addresses are verified as
3980      recipients, not senders.
3981
3982TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
3983      the ratelimit ACL was added.
3984
3985PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
3986
3987PH/46 Added extra information about PostgreSQL errors to the error string.
3988
3989PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
3990      avoiding the need to install special zones in a real server. This is
3991      backwards compatible; if it can't find the fake resolver, it drops back.
3992      Thus, both old and new test suites can be run.
3993
3994TF/02 Added util/ratelimit.pl
3995
3996TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
3997      clock is set back in time.
3998
3999TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4000      Candler <B.Candler@pobox.com>.
4001
4002TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4003      OK for addresses that are the result of redirections.
4004
4005PH/48 A number of further additions for the benefit of the new test suite,
4006      including a fake gethostbyname() that interfaces to the fake DNS resolver
4007      (see PH/47 above).
4008
4009TF/06 The fix for widen_domains has also been applied to qualify_single and
4010      search_parents which are the other dnslookup options that can cause
4011      header rewrites.
4012
4013PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4014      type ("H").
4015
4016PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4017
4018TF/07 Exim produced the error message "an SRV record indicated no SMTP
4019      service" if it encountered an MX record with an empty target hostname.
4020      The message is now "an MX or SRV record indicated no SMTP service".
4021
4022TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4023      if the DNS of the sending site is misconfigured. This is quite a
4024      common situation. This change restores the behaviour of treating a
4025      helo verification defer as a failure.
4026
4027PH/51 If self=fail was set on a router, the bounce message did not include the
4028      actual error message.
4029
4030
4031Exim version 4.52
4032-----------------
4033
4034TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4035
4036PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4037      command itself ended in error, the underlying message about the transport
4038      filter timeout was being overwritten with the pipe command error. Now the
4039      underlying error message should be appended to the second error message.
4040
4041TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4042
4043PH/02 Reduce the amount of output that "make" produces by default. Full output
4044      can still be requested.
4045
4046PH/03 The warning log line about a condition test deferring for a "warn" verb
4047      was being output only once per connection, rather than after each
4048      occurrence (because it was using the same function as for successful
4049      "warn" verbs). This seems wrong, so I have changed it.
4050
4051TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4052      it should not have, which might have caused a crash in the right
4053      circumstances, but probably never did.
4054
4055PH/04 Installed a modified version of Tony Finch's patch to make submission
4056      mode fix the return path as well as the Sender: header line, and to
4057      add a /name= option so that you can make the user's friendly name appear
4058      in the header line.
4059
4060TF/03 Added the control = fakedefer ACL modifier.
4061
4062TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4063      Mark Lowes for thorough testing.
4064
4065TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4066
4067TK/03 Merged latest SRS patch from Miles Wilton.
4068
4069PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4070      with the definition in sysexits.h (which is #included earlier).
4071      Fortunately, Exim does not actually use EX_OK. The code used to try to
4072      preserve the sysexits.h value, by assuming that macro definitions were
4073      scanned for macro replacements. I have been disabused of this notion,
4074      so now the code just undefines EX_OK before #including unistd.h.
4075
4076PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4077      in the smtp transport. When a block could not be written in a single
4078      write() function, the timeout was being re-applied to each part-write.
4079      This seems wrong - if the receiver was accepting one byte at a time it
4080      would take for ever. The timeout is now adjusted when this happens. It
4081      doesn't have to be particularly precise.
4082
4083TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4084      details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4085
4086PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4087      without a domain if the check to <postmaster@domain> fails.
4088
4089SC/01 Eximstats: added -xls and the ability to specify output files
4090     (patch written by Frank Heydlauf).
4091
4092SC/02 Eximstats: use FileHandles for outputting results.
4093
4094SC/03 Eximstats: allow any combination of xls, txt, and html output.
4095
4096SC/04 Eximstats: fixed display of large numbers with -nvr option
4097
4098SC/05 Eximstats: fixed merging of reports with empty tables.
4099
4100SC/06 Eximstats: added the -include_original_destination flag
4101
4102SC/07 Eximstats: removed tabs and trailing whitespace.
4103
4104TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4105
4106TK/06 MBOX spool code: Add real "From " MBOX separator line
4107      so the .eml file is really in mbox format (even though
4108      most programs do not really care). Patch from Alex Miller.
4109
4110TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4111      The latter is generated from $received_to and is only set if the
4112      message has one envelope recipient. SA can use these headers,
4113      obviously out-of-the-box. Patch from Alex Miller.
4114
4115PH/08 The ${def test on a variable was returning false if the variable's
4116      value was "0", contrary to what the specification has always said!
4117      The result should be true unless the variable is empty.
4118
4119PH/09 The syntax error of a character other than { following "${if
4120      def:variable_name" (after optional whitespace) was not being diagnosed.
4121      An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4122      accidental colon was present, for example, could give incorrect results.
4123
4124PH/10 Tidied the code in a number of places where the st_size field of a stat()
4125      result is used (not including appendfile, where other changes are about
4126      to be made).
4127
4128PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4129      This involved changing a lot of size variables from int to off_t. It
4130      should work with maildirs and everything.
4131
4132TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4133      spamd dying while we are connected to it.
4134
4135TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4136      <jgh@wizmail.org>
4137
4138PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4139      function for BDB 4.3.
4140
4141PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4142
4143PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4144      the sources for PCRE have been re-arranged and more files are now
4145      involved.
4146
4147PH/15 The code I had for printing potentially long long variables in PH/11
4148      above was not the best (it lost precision). The length of off_t variables
4149      is now inspected at build time, and an appropriate printing format (%ld
4150      or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4151      to be "long long int" or "long int". This is needed for the internal
4152      formatting function string_vformat().
4153
4154PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4155      the configuration file to be ":syslog", then the script "guesses" where
4156      the logs files are, rather than using the compiled in default. In our
4157      case the guess is not the same as the compiled default, so the script
4158      suddenly stopped working when I started to use syslog. The patch checks
4159      to see if log_file_path is "". If so, it attempts to read it from exim
4160      with no configuration file to get the compiled in version, before it
4161      falls back to the previous guessing code."
4162
4163TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4164      implementing BATV in an Exim configuration. See NewStuff for the gory
4165      details.
4166
4167PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4168      Makefile that are specific to HP-UX.
4169
4170PH/18 If the "use_postmaster" option was set for a recipient callout together
4171      with the "random" option, the postmaster address was used as the MAIL
4172      FROM address for the random test, but not for the subsequent recipient
4173      test. It is now used for both.
4174
4175PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4176      patch removes a few documentation additions to RFC 3028, because the
4177      latest draft now contains them. It adds the new en;ascii-case comparator
4178      and a new error check for 8bit text in MIME parts. Comparator and
4179      require names are now matched exactly. I enabled the subaddress
4180      extension, but it is not well tested yet (read: it works for me)."
4181
4182PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4183      rework some of the code of TK/09 above to avoid the hardwired use of
4184      "%lld" and "long long". Replaced the call to snprintf() with a call to
4185      string_vformat().
4186
4187PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4188      records point to non-existent hosts", "retry timeout exceeded", and
4189      "retry time not reached for any host after a long failure period".
4190
4191PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4192      experimental DomainKeys support:
4193
4194      (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4195      (2) On an error such as an illegally used "control", the wrong name for
4196          the control was given.
4197
4198      These problems did NOT occur unless DomainKeys support was compiled.
4199
4200PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4201
4202PH/24 Added ${if match_ip condition.
4203
4204PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4205      databases so that it will be absolutely obvious if a crash occurs in the
4206      DB library. This is a regular occurrence (often caused by mis-matched
4207      db.h files).
4208
4209PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4210      chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4211      picked up on a user's system that detects such things. There doesn't seem
4212      to be a gcc warning option for this - only an attribute that has to be
4213      put on the function's prototype. It seems that in Fedora Core 4 they have
4214      set this on a number of new functions. No doubt there will be more in due
4215      course.
4216
4217PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4218      specify a transport. However, if an address that was verified by such a
4219      router was the subject of a callout, Exim crashed because it tried to
4220      read the rcpt_include_affixes from the non-existent transport. Now it
4221      just assumes that the setting of that option is false. This bug was
4222      introduced by 4.51/PH/31.
4223
4224PH/28 Changed -d+all to exclude +memory, because that information is very
4225      rarely of interest, but it makes the output a lot bigger. People tend to
4226      do -d+all out of habit.
4227
4228PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4229      code in os-type was giving problems when libc.so lives in lib64, like on
4230      x86_64 Fedora Core.
4231
4232PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4233      aren't the modern standard, and it seems that some systems' include files
4234      don't always have them. Exim was already checking for some of the newer
4235      ones like T_AAAA, and defining it itself. I've added checks for all the
4236      record types that Exim uses.
4237
4238PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4239      not automatically generating a new one, as it is supposed to. This
4240      prevented TLS from working. If the file did exist, but contained invalid
4241      data, a new version was generated, as expected. It was only the case of a
4242      non-existent file that was broken.
4243
4244TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4245      with a change in libdomainkeys > 0.64.
4246
4247TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4248      from DNS. If the selector record carries the flag, it now has
4249      precedence over the domain-wide flag.
4250
4251TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4252
4253PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4254      the use of a port name that isn't defined in /etc/services) occurred, the
4255      message was deferred as in a normal delivery, and thus remained on the
4256      spool, instead of being failed because of the mua_wrapper setting. This
4257      is now fixed, and I tidied up some of the mua_wrapper messages at the
4258      same time.
4259
4260SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4261      the messages in a hash of arrays rather than using individual hashes.
4262      This is a bit cleaner and results in dramatic memory savings, albeit
4263      at a slight CPU cost.
4264
4265SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4266      as requested by Marc Sherman.
4267
4268SC/10 Eximstats: added histograms for user specified patterns as requested
4269      by Marc Sherman.
4270
4271SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4272
4273PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4274      fopen() in the content-scanning modules that did not already have it.
4275
4276
4277Exim version 4.51
4278-----------------
4279
4280TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4281      doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4282
4283TK/02 Fix ACL "control" statement not being available in MIME ACL.
4284
4285TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4286
4287PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4288      to test Sieve filters that use "vacation".
4289
4290PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4291      that changes the way the GnuTLS parameters are stored in the cache file.
4292      The new format can be generated externally. For backward compatibility,
4293      if the data in the cache doesn't make sense, Exim assumes it has read an
4294      old-format file, and it generates new data and writes a new file. This
4295      means that you can't go back to an older release without removing the
4296      file.
4297
4298PH/03 A redirect router that has both "unseen" and "one_time" set does not
4299      work if there are any delivery delays because "one_time" forces the
4300      parent to be marked "delivered", so its unseen clone is never tried
4301      again. For this reason, Exim now forbids the simultaneous setting of
4302      these two options.
4303
4304PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4305      redirected to themselves ("homonym" addresses). Read the long ChangeLog
4306      entry if you want to know the details. The fix, however, neglected to
4307      consider the case when local delivery batching is involved. The test for
4308      "previously delivered" was not happening when checking to see if an
4309      address could be batched with a previous (undelivered) one; under
4310      certain circumstances this could lead to multiple deliveries to the same
4311      address.
4312
4313PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4314      in its include files, and this causes problems building Exim.
4315
4316PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4317      header_syntax) but Exim was just ignoring anything given after a slash.
4318      In particular, this caused confusion with an attempt to use "verify =
4319      reverse_host_lookup/defer_ok". An error is now given when options are
4320      supplied for verify items that do not have them. (Maybe reverse_host_
4321      lookup should have a defer_ok option, but that's a different point.)
4322
4323PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4324      defined by RFC 821) to 2048, because there were problems with some AUTH
4325      commands, and RFC 1869 says the size should be increased for extended
4326      SMTP commands that take arguments.
4327
4328PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4329      Finch).
4330
4331PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4332      "unknown" error; now it says that the functionality isn't in the binary.
4333
4334PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4335      an address' error message when a string expansion fails (syntax or
4336      whatever). Otherwise the password may appear in the log. Following change
4337      PH/42 below, there is no longer a chance of it appearing in a bounce
4338      message.
4339
4340PH/11 Installed exipick version 20050225.0 from John Jetmore.
4341
4342PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4343      of its addresses was ever tried. (Bugzilla bug #2.)
4344
4345PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4346      the result incorrectly in the debug output. (It correctly added a newline
4347      to what was transported.)
4348
4349TF/01 Added $received_time.
4350
4351PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4352      commented out examples of how to interface to a virus scanner and to
4353      SpamAssassin. Also added commented examples of av_scanner and
4354      spamd_address settings.
4355
4356PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4357      and controls are allowed in which ACLs. There were a couple of minor
4358      errors. Some of the entries in the conditions table (which is a table of
4359      where they are NOT allowed) were getting very unwieldy; rewrote them as a
4360      negation of where the condition IS allowed.
4361
4362PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4363
4364PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4365      header file does not have a version number, so I've had to invent a new
4366      value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4367      API. The code is untested by me (my Linux distribution still has 0.3.2 of
4368      radiusclient), but it was contributed by a Radius user.
4369
4370PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4371      files or directories, for OpenSSL.
4372
4373PH/19 When an Exim process that is running as root has to create an Exim log
4374      file, it does so in a subprocess that runs as exim:exim so as to get the
4375      ownership right at creation (otherwise, other Exim processes might see
4376      the file with the wrong ownership). There was no test for failure of this
4377      fork() call, which would lead to the process getting stuck as it waited
4378      for a non-existent subprocess. Forks do occasionally fail when resources
4379      run out. I reviewed all the other calls to fork(); they all seem to check
4380      for failure.
4381
4382PH/20 When checking for unexpected SMTP input at connect time (before writing
4383      the banner), Exim was not dealing correctly with a non-positive return
4384      from the read() function. If the client had disconnected by this time,
4385      the result was a log entry for a synchronization error with an empty
4386      string after "input=" when read() returned zero. If read() returned -1
4387      (an event I could not check), uninitialized data bytes were printed.
4388      There were reports of junk text (parts of files, etc) appearing after
4389      "input=".
4390
4391PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4392
4393PH/22 Added support for macro redefinition, and (re)definition in between
4394      driver and ACL definitions.
4395
4396PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4397      forgetting to use the resulting value; it was using the unexpanded value.
4398
4399PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4400      hadn't been configured. The fix is from Juergen Kreileder, who
4401      understands it better than I do:
4402
4403      "Here's what I see happening with three configured cyrus_sasl
4404      authenticators configured (plain, login, cram-md5):
4405
4406      On startup auth_cyrus_sasl_init() gets called for each of these.
4407      This means three calls to sasl_listmech() without a specified mech_list.
4408      => SASL tests which mechs of all available mechs actually work
4409      => three warnings about OTP not working
4410      => the returned list contains: plain, login, cram-md5, digest-md5, ...
4411
4412      With the patch, sasl_listmech() also gets called three times.  But now
4413      SASL's mech_list option is set to the server_mech specified in the the
4414      authenticator.  Or in other words, the answer from sasl_listmech()
4415      gets limited to just the mech you're testing for (which is different
4416      for each call.)
4417      => the return list contains just 'plain' or 'login', 'cram-md5' or
4418      nothing depending on the value of ob->server_mech.
4419
4420      I've just tested the patch: Authentication still works fine,
4421      unavailable mechs specified in the exim configuration are still
4422      caught, and the auth.log warnings about OTP are gone."
4423
4424PH/25 When debugging is enabled, the contents of the command line are added
4425      to the debugging output, even when log_selector=+arguments is not
4426      specified.
4427
4428PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4429      answer is "GNU", and only if the return is "GNU/something" is the answer
4430      "Linux".
4431
4432PH/27 $acl_verify_message is now set immediately after the failure of a
4433      verification in an ACL, and so is available in subsequent modifiers. In
4434      particular, the message can be preserved by coding like this:
4435
4436         warn  !verify = sender
4437               set acl_m0 = $acl_verify_message
4438
4439      Previously, $acl_verify_message was set only while expanding "message"
4440      and "log_message" when a very denied access.
4441
4442PH/28 Modified OS/os.c-Linux with
4443
4444        -#ifndef OS_LOAD_AVERAGE
4445        +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4446
4447      to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4448      nomenclature these days.)
4449
4450PH/29 Installed patch from the Sieve maintainer that adds the options
4451      sieve_useraddress and sieve_subaddress to the redirect router.
4452
4453PH/30 In these circumstances:
4454        . Two addresses routed to the same list of hosts;
4455        . First host does not offer TLS;
4456        . First host accepts first address;
4457        . First host gives temporary error to second address;
4458        . Second host offers TLS and a TLS session is established;
4459        . Second host accepts second address.
4460      Exim incorrectly logged both deliveries with the TLS parameters (cipher
4461      and peerdn, if requested) that were in fact used only for the second
4462      address.
4463
4464PH/31 When doing a callout as part of verifying an address, Exim was not paying
4465      attention to any local part prefix or suffix that was matched by the
4466      router that accepted the address. It now behaves in the same way as it
4467      does for delivery: the affixes are removed from the local part unless
4468      rcpt_include_affixes is set on the transport.
4469
4470PH/32 Add the sender address, as F=<...>, to the log line when logging a
4471      timeout during the DATA phase of an incoming message.
4472
4473PH/33 Sieve envelope tests were broken for match types other than :is. I have
4474      applied a patch sanctioned by the Sieve maintainer.
4475
4476PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4477      the uid or gid is negative. A case of a negative gid caused this to be
4478      noticed. The fix allows for either to be negative.
4479
4480PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4481      clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4482      overlooked.
4483
4484PH/36 The change PH/12 above was broken. Fixed it.
4485
4486PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4487      the grounds that routing the same address twice would always produce the
4488      same answer. This might have been true once, but it is certainly no
4489      longer true now. Routing a child address may depend on the previous
4490      routing that produced that child. Some complicated redirection strategies
4491      went wrong when messages had multiple recipients, and made Exim's
4492      behaviour dependent on the order in which the addresses were given.
4493
4494      I have moved the duplicate checking until after the routing is complete.
4495      Exim scans the addresses that are assigned to local and remote
4496      transports, and removes any duplicates. This means that more work will be
4497      done, as duplicates will always all be routed, but duplicates are
4498      presumably rare, so I don't expect this is of any significance.
4499
4500      For deliveries to pipes, files, and autoreplies, the duplicate checking
4501      still happens during the routing process, since they are not going to be
4502      routed further.
4503
4504PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4505      It corrects a timeout issue with spamd. This is Ian's comment: "The
4506      background is that sometimes spamd either never reads data from a
4507      connection it has accepted, or it never writes response data. The exiscan
4508      spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4509      blindly assumes that writes won't block so it may never time out."
4510
4511PH/39 Allow G after quota size as well as K and M.
4512
4513PH/40 The value set for $authenticated_id in an authenticator may not contain
4514      binary zeroes or newlines because the value is written to log lines and
4515      to spool files. There was no check on this. Now the value is run through
4516      the string_printing() function so that such characters are converted to
4517      printable escape sequences.
4518
4519PH/41 $message_linecount is a new variable that contains the total number of
4520      lines in the message. Compare $body_linecount, which is the count for the
4521      body only.
4522
4523PH/42 Exim no longer gives details of delivery errors for specific addresses in
4524      bounce and delay warning messages, except in certain special cases, which
4525      are as follows:
4526
4527      (a) An SMTP error message from a remote host;
4528      (b) A message specified in a :fail: redirection;
4529      (c) A message specified in a "fail" command in a system filter;
4530      (d) A message specified in a FAIL return from the queryprogram router;
4531      (e) A message specified by the cannot_route_message router option.
4532
4533      In these cases only, Exim does include the error details in bounce and
4534      warning messages. There are also a few cases where bland messages such
4535      as "unrouteable address" or "local delivery error" are given.
4536
4537PH/43 $value is now also set for the "else" part of a ${run expansion.
4538
4539PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4540      being worked on, but at least Exim now implements the latest version to
4541      play with."
4542
4543PH/45 In a pipe transport, although a timeout while waiting for the pipe
4544      process to complete was treated as a delivery failure, a timeout while
4545      writing the message to the pipe was logged, but erroneously treated as a
4546      successful delivery. Such timeouts include transport filter timeouts. For
4547      consistency with the overall process timeout, these timeouts are now
4548      treated as errors, giving rise to delivery failures by default. However,
4549      there is now a new Boolean option for the pipe transport called
4550      timeout_defer, which, if set TRUE, converts the failures into defers for
4551      both kinds of timeout. A transport filter timeout is now identified in
4552      the log output.
4553
4554PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4555      systems where "make" and "gmake" are different, calling "gmake" at top
4556      level broke things. I've arranged for the value of $(MAKE) to be passed
4557      from the Makefile to this script so that it can call the same version of
4558      "make".
4559
4560
4561A note about Exim versions 4.44 and 4.50
4562----------------------------------------
4563
4564Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4565changes of various kinds. As a consequence, a big documentation update was
4566needed. This delayed the release for rather longer than seemed good, especially
4567in the light of a couple of (minor) security issues. Therefore, the changes
4568that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4569release. So 4.44 and 4.50 are in effect two different branches that both start
4570from 4.43.
4571
4572I have left the 4.50 change log unchanged; it contains all the changes since
45734.43. The change log for 4.44 is below; many of its items are identical to
4574those for 4.50. This seems to be the most sensible way to preserve the
4575historical information.
4576
4577
4578Exim version 4.50
4579-----------------
4580
4581 1. Minor wording change to the doc/README.SIEVE file.
4582
4583 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4584    computation of the current number of files was incorrect.
4585
4586 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4587    bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4588    place.
4589
4590 4. Give more explanation in the error message when the command for a transport
4591    filter fails to execute.
4592
4593 5. There are several places where Exim runs a non-Exim command in a
4594    subprocess. The SIGUSR1 signal should be disabled for these processes. This
4595    was being done only for the command run by the queryprogram router. It is
4596    now done for all such subprocesses. The other cases are: ${run, transport
4597    filters, and the commands run by the lmtp and pipe transports.
4598
4599 6. Added CONFIGURE_GROUP build-time option.
4600
4601 7. Some older OS have a limit of 256 on the maximum number of file
4602    descriptors. Exim was using setrlimit() to set 1000 as a large value
4603    unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4604    systems. I've change it so that if it can't get 1000, it tries for 256.
4605
4606 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4607    was an oversight, and furthermore, ever since the addition of extra
4608    controls (e.g. 4.43/32), the checks on when to allow different forms of
4609    "control" were broken. There should now be diagnostics for all cases when a
4610    control that does not make sense is encountered.
4611
4612 9. Added the /retain_sender option to "control=submission".
4613
461410. $recipients is now available in the predata ACL (oversight).
4615
461611. Tidy the search cache before the fork to do a delivery from a message
4617    received from the command line. Otherwise the child will trigger a lookup
4618    failure and thereby defer the delivery if it tries to use (for example) a
4619    cached ldap connection that the parent has called unbind on.
4620
462112. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4622    of $address_data from the recipient verification was clobbered by the
4623    sender verification.
4624
462513. The value of address_data from a sender verification is now available in
4626    $sender_address_data in subsequent conditions in the ACL statement.
4627
462814. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4629
463015. Added a new option "connect=<time>" to callout options, to set a different
4631    connection timeout.
4632
463316. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4634    was its contents. (It was OK if the option was not defined at all.)
4635
463617. A "Completed" log line is now written for messages that are removed from
4637    the spool by the -Mrm option.
4638
463918. New variables $sender_verify_failure and $recipient_verify_failure contain
4640    information about exactly what failed.
4641
464219. Added -dd to debug only the daemon process.
4643
464420. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4645    handles timeouts, both on the server side and network timeouts. Renamed the
4646    CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4647
464821. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4649    It is now set to "smtps".
4650
465122. $host_address is now set to the target address during the checking of
4652    ignore_target_hosts.
4653
465423. When checking ignore_target_hosts for an ipliteral router, no host name was
4655    being passed; this would have caused $sender_host_name to have been used if
4656    matching the list had actually called for a host name (not very likely,
4657    since this list is usually IP addresses). A host name is now passed as
4658    "[x.x.x.x]".
4659
466024. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4661    code that specifies a non-restarting handler (typically sigaction() in
4662    modern systems) in an attempt to fix a rare and obscure crash bug.
4663
466425. Narrowed the window for a race in the daemon that could cause it to ignore
4665    SIGCHLD signals. This is not a major problem, because they are used only to
4666    wake it up if nothing else does.
4667
466826. A malformed maildirsize file could cause Exim to calculate negative values
4669    for the mailbox size or file count. Odd effects could occur as a result.
4670    The maildirsize information is now recalculated if the size or filecount
4671    end up negative.
4672
467327. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4674    support for a long time. Removed HAVE_SYS_VFS_H.
4675
467628. Installed the latest version of exipick from John Jetmore.
4677
467829. In an address list, if the pattern was not a regular expression, an empty
4679    subject address (from a bounce message) matched only if the pattern was an
4680    empty string. Non-empty patterns were not even tested. This was the wrong
4681    because it is perfectly reasonable to use an empty address as part of a
4682    database query. An empty address is now tested by patterns that are
4683    lookups. However, all the other forms of pattern expect the subject to
4684    contain a local part and a domain, and therefore, for them, an empty
4685    address still always fails if the pattern is not itself empty.
4686
468730. Exim went into a mad DNS loop when attempting to do a callout where the
4688    host was specified on an smtp transport, and looking it up yielded more
4689    than one IP address.
4690
469131. Re-factored the code for checking spool and log partition space into a
4692    function that finds that data and another that does the check. The former
4693    is then used to implement four new variables: $spool_space, $log_space,
4694    $spool_inodes, and $log_inodes.
4695
469632. The RFC2047 encoding function was originally intended for short strings
4697    such as real names; it was not keeping to the 75-character limit for
4698    encoded words that the RFC imposes. It now respects the limit, and
4699    generates multiple encoded words if necessary. To be on the safe side, I
4700    have increased the buffer size for the ${rfc2047: expansion operator from
4701    1024 to 2048 bytes.
4702
470333. It is now permitted to omit both strings after an "if" condition; if the
4704    condition is true, the result is "true". As before, when the second string
4705    is omitted, a false condition yields an empty string. This makes it less
4706    cumbersome to write custom ACL and router conditions.
4707
470834. Failure to deliver a bounce message always caused it to be frozen, even if
4709    there was an errors_to setting on the router. The errors_to setting is now
4710    respected.
4711
471235. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4713    canonical form (fully expanded) before being placed in
4714    $sender_host_address.
4715
471636. The table in the code that translates DNS record types into text (T_A to
4717    "A" for instance) was missing entries for NS and CNAME. It is just possible
4718    that this could have caused confusion if both these types were looked up
4719    for the same domain, because the text type is used as part of Exim's
4720    per-process caching. But the chance of anyone hitting this buglet seems
4721    very small.
4722
472337. The dnsdb lookup has been extended in a number of ways.
4724
4725    (1) There is a new type, "zns", which walks up the domain tree until it
4726        finds some nameserver records. It should be used with care.
4727
4728    (2) There is a new type, "mxh", which is like "mx" except that it returns
4729        just the host names, not the priorities.
4730
4731    (3) It is now possible to give a list of domains (or IP addresses) to be
4732        looked up. The behaviour when one of the lookups defers can be
4733        controlled by a keyword.
4734
4735    (4) It is now possible to specify the separator character for use when
4736        multiple records are returned.
4737
473838. The dnslists ACL condition has been extended: it is now possible to supply
4739    a list of IP addresses and/or domains to be looked up in a particular DNS
4740    domain.
4741
474239. Added log_selector=+queue_time_overall.
4743
474440. When running the queue in the test harness, wait just a tad after forking a
4745    delivery process, to get repeatability of debugging output.
4746
474741. Include certificate and key file names in error message when GnuTLS fails
4748    to set them up, because the GnuTLS error message doesn't include the name
4749    of the failing file when there is a problem reading it.
4750
475142. Allow both -bf and -bF in the same test run.
4752
475343. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4754
475544. The "Exiscan patch" is now merged into the mainline Exim source.
4756
475745. Sometimes the final signoff response after QUIT could fail to get
4758    transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4759    < 0 before doing a fflush(). This bug looks as though it goes back to the
4760    introduction of TLS in release 3.20, but "sometimes" must have been rare
4761    because the tests only now provoked it.
4762
476346. Reset the locale to "C" after calling embedded Perl, in case it was changed
4764    (this can affect the format of dates).
4765
476647. exim_tidydb, when checking for the continued existence of a message for
4767    which it has found a message-specific retry record, was not finding
4768    messages that were in split spool directories. Consequently, it was
4769    deleting retry records that should have stayed in existence.
4770
477148. Steve fixed some bugs in eximstats.
4772
477349. The SPA authentication driver was not abandoning authentication and moving
4774    on to the next authenticator when an expansion was forced to fail,
4775    contradicting the general specification for all authenticators. Instead it
4776    was generating a temporary error. It now behaves as specified.
4777
477850. The default ordering of permitted cipher suites for GnuTLS was pessimal
4779    (the order specifies the preference for clients). The order is now AES256,
4780    AES128, 3DES, ARCFOUR128.
4781
478251. Small patch to Sieve code - explicitly set From: when generating an
4783    autoreply.
4784
478552. Exim crashed if a remote delivery caused a very long error message to be
4786    recorded - for instance if somebody sent an entire SpamAssassin report back
4787    as a large number of 550 error lines. This bug was coincidentally fixed by
4788    increasing the size of one of Exim's internal buffers (big_buffer) that
4789    happened as part of the Exiscan merge. However, to be on the safe side, I
4790    have made the code more robust (and fixed the comments that describe what
4791    is going on).
4792
479353. Now that there can be additional text after "Completed" in log lines (if
4794    the queue_time_overall log selector is set), a one-byte patch to exigrep
4795    was needed to allow it to recognize "Completed" as not the last thing in
4796    the line.
4797
479854. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4799    patch that reportedly fixes this has been added. I am not expert enough to
4800    create a test for it. This is what the patch creator wrote:
4801
4802      "I found a little strange behaviour of ldap code when working with
4803      Windows 2003 AD Domain, where users was placed in more than one
4804      Organization Units. When I tried to give exim partial DN, the exit code
4805      of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
4806      But simultaneously result of request was absolutely normal ldap result,
4807      so I produce this patch..."
4808
4809    Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
4810    REFERENCE, so I have modified the code to exclude the patch when that macro
4811    is not defined.
4812
481355. Some experimental protocols are using DNS PTR records for new purposes. The
4814    keys for these records are domain names, not reversed IP addresses. The
4815    dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4816    leaves it alone. Component reversal etc. now happens only for IP addresses.
4817    CAN-2005-0021
4818
481956. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
4820
482157. Double the size of the debug message buffer (to 2048) so that more of very
4822    long debug lines gets shown.
4823
482458. The exicyclog utility now does better if the number of log files to keep
4825    exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
4826
482759. Two changes related to the smtp_active_hostname option:
4828
4829      (1) $smtp_active_hostname is now available as a variable.
4830      (2) The default for smtp_banner uses $smtp_active_hostname instead
4831          of $primary_hostname.
4832
483360. The host_aton() function is supposed to be passed a string that is known
4834    to be a valid IP address. However, in the case of IPv6 addresses, it was
4835    not checking this. This is a hostage to fortune. Exim now panics and dies
4836    if the condition is not met. A case was found where this could be provoked
4837    from a dnsdb PTR lookup with an IPv6 address that had more than 8
4838    components; fortuitously, this particular loophole had already been fixed
4839    by change 4.50/55 above.
4840
4841    If there are any other similar loopholes, the new check in host_aton()
4842    itself should stop them being exploited. The report I received stated that
4843    data on the command line could provoke the exploit when Exim was running as
4844    exim, but did not say which command line option was involved. All I could
4845    find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4846    running as the user.
4847    CAN-2005-0021
4848
484961. There was a buffer overflow vulnerability in the SPA authentication code
4850    (which came originally from the Samba project). I have added a test to the
4851    spa_base64_to_bits() function which I hope fixes it.
4852    CAN-2005-0022
4853
485462. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
4855    os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
4856
485763. The daemon start-up calls getloadavg() while still root for those OS that
4858    need the first call to be done as root, but it missed one case: when
4859    deliver_queue_load_max is set with deliver_drop_privilege. This is
4860    necessary for the benefit of the queue runner, because there is no re-exec
4861    when deliver_drop_privilege is set.
4862
486364. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
4864    This has been fixed.
4865
486665. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4867    was in use, was not putting the data itself into the right store pool;
4868    consequently, it could be overwritten for a subsequent message in the same
4869    SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4870    the caching.)
4871
487266. Added hosts_max_try_hardlimit to the smtp transport, default 50.
4873
487467. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
4875    address", "IPv4 address", and "IPv6 address", respectively. Some calls of
4876    the function were treating the return as a boolean value, which happened to
4877    work because 0=false and not-0=true, but is not correct code.
4878
487968. The host_aton() function was not handling scoped IPv6 addresses (those
4880    with, for example, "%eth0" on the end) correctly.
4881
488269. Fixed some compiler warnings in acl.c for the bitmaps specified with
4883    negated items (that is, ~something) in unsigned ints. Some compilers
4884    apparently mutter when there is no cast.
4885
488670. If an address verification called from an ACL failed, and did not produce a
4887    user-specific message (i.e. there was only a "system" message), nothing was
4888    put in $acl_verify_message. In this situation, it now puts the system
4889    message there.
4890
489171. Change 4.23/11 added synchronization checking at the start of an SMTP
4892    session; change 4.31/43 added the unwanted input to the log line - except
4893    that it did not do this in the start of session case. It now does.
4894
489572. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
4896    This is wrong and can cause the other end to generate a synchronization
4897    error if it is another Exim or anything else that does the synchronization
4898    check. A QUIT command is no longer sent after a timeout.
4899
490073. $host_lookup_deferred has been added, to make it easier to detect DEFERs
4901    during host lookups.
4902
490374. The defer_ok option of callout verification was not working if it was used
4904    when verifying addresses in header lines, that is, for this case:
4905
4906      verify = header_sender/callout=defer_ok
4907
490875. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
4909    those file descriptors could be used for SMTP connections. If anything
4910    wrote to stderr (the example that came up was "warn" in embedded Perl), it
4911    could be sent to the SMTP client, causing chaos. The daemon now opens
4912    stdin, stdout, and stderr to /dev/null when it puts itself into the
4913    background.
4914
491576. Arrange for output from Perl's "warn" command to be written to Exim's main
4916    log by default. The user can override this with suitable Perl magic.
4917
491877. The use of log_message on a "discard" ACL verb, which is supposed to add to
4919    the log message when discard triggers, was not working for the DATA ACL or
4920    for the non-SMTP ACL.
4921
492278. Error message wording change in sieve.c.
4923
492479. If smtp_accept_max_per_host was set, the number of connections could be
4925    restricted to fewer than expected, because the daemon was trying to set up
4926    a new connection before checking whether the processes handling previous
4927    connections had finished. The check for completed processes is now done
4928    earlier. On busy systems, this bug wouldn't be noticed because something
4929    else would have woken the daemon, and it would have reaped the completed
4930    process earlier.
4931
493280. If a message was submitted locally by a user whose login name contained one
4933    or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
4934    It caused a spool format error. I have fixed the spool reading code. A
4935    related problem was that the "from" clause in the Received: line became
4936    illegal because of the space(s). It is now covered by ${quote_local_part.
4937
493881. Included the latest eximstats from Steve (adds average sizes to HTML Top
4939    tables).
4940
494182. Updated OS/Makefile-AIX as per message from Mike Meredith.
4942
494383. Patch from Sieve maintainer to fix unterminated string problem in
4944    "vacation" handling.
4945
494684. Some minor changes to the Linux configuration files to help with other
4947    OS variants using glibc.
4948
494985. One more patch for Sieve to update vacation handling to latest spec.
4950
4951
4952----------------------------------------------------
4953See the note above about the 4.44 and 4.50 releases.
4954----------------------------------------------------
4955
4956
4957Exim version 4.44
4958-----------------
4959
4960 1. Change 4.43/35 introduced a bug that caused file counts to be
4961    incorrectly computed when quota_filecount was set in an appendfile
4962    transport
4963
4964 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4965    bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4966    place.
4967
4968 3. Give more explanation in the error message when the command for a transport
4969    filter fails to execute.
4970
4971 4. There are several places where Exim runs a non-Exim command in a
4972    subprocess. The SIGUSR1 signal should be disabled for these processes. This
4973    was being done only for the command run by the queryprogram router. It is
4974    now done for all such subprocesses. The other cases are: ${run, transport
4975    filters, and the commands run by the lmtp and pipe transports.
4976
4977 5. Some older OS have a limit of 256 on the maximum number of file
4978    descriptors. Exim was using setrlimit() to set 1000 as a large value
4979    unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4980    systems. I've change it so that if it can't get 1000, it tries for 256.
4981
4982 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4983    was an oversight, and furthermore, ever since the addition of extra
4984    controls (e.g. 4.43/32), the checks on when to allow different forms of
4985    "control" were broken. There should now be diagnostics for all cases when a
4986    control that does not make sense is encountered.
4987
4988 7. $recipients is now available in the predata ACL (oversight).
4989
4990 8. Tidy the search cache before the fork to do a delivery from a message
4991    received from the command line. Otherwise the child will trigger a lookup
4992    failure and thereby defer the delivery if it tries to use (for example) a
4993    cached ldap connection that the parent has called unbind on.
4994
4995 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4996    of $address_data from the recipient verification was clobbered by the
4997    sender verification.
4998
499910. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5000    was its contents. (It was OK if the option was not defined at all.)
5001
500211. A "Completed" log line is now written for messages that are removed from
5003    the spool by the -Mrm option.
5004
500512. $host_address is now set to the target address during the checking of
5006    ignore_target_hosts.
5007
500813. When checking ignore_target_hosts for an ipliteral router, no host name was
5009    being passed; this would have caused $sender_host_name to have been used if
5010    matching the list had actually called for a host name (not very likely,
5011    since this list is usually IP addresses). A host name is now passed as
5012    "[x.x.x.x]".
5013
501414. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5015    code that specifies a non-restarting handler (typically sigaction() in
5016    modern systems) in an attempt to fix a rare and obscure crash bug.
5017
501815. Narrowed the window for a race in the daemon that could cause it to ignore
5019    SIGCHLD signals. This is not a major problem, because they are used only to
5020    wake it up if nothing else does.
5021
502216. A malformed maildirsize file could cause Exim to calculate negative values
5023    for the mailbox size or file count. Odd effects could occur as a result.
5024    The maildirsize information is now recalculated if the size or filecount
5025    end up negative.
5026
502717. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5028    support for a long time. Removed HAVE_SYS_VFS_H.
5029
503018. Updated exipick to current release from John Jetmore.
5031
503219. Allow an empty sender to be matched against a lookup in an address list.
5033    Previously the only cases considered were a regular expression, or an
5034    empty pattern.
5035
503620. Exim went into a mad DNS lookup loop when doing a callout where the
5037    host was specified on the transport, if the DNS lookup yielded more than
5038    one IP address.
5039
504021. The RFC2047 encoding function was originally intended for short strings
5041    such as real names; it was not keeping to the 75-character limit for
5042    encoded words that the RFC imposes. It now respects the limit, and
5043    generates multiple encoded words if necessary. To be on the safe side, I
5044    have increased the buffer size for the ${rfc2047: expansion operator from
5045    1024 to 2048 bytes.
5046
504722. Failure to deliver a bounce message always caused it to be frozen, even if
5048    there was an errors_to setting on the router. The errors_to setting is now
5049    respected.
5050
505123. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5052    canonical form (fully expanded) before being placed in
5053    $sender_host_address.
5054
505524. Updated eximstats to version 1.33
5056
505725. Include certificate and key file names in error message when GnuTLS fails
5058    to set them up, because the GnuTLS error message doesn't include the name
5059    of the failing file when there is a problem reading it.
5060
506126. Expand error message when OpenSSL has problems setting up cert/key files.
5062    As per change 25.
5063
506427. Reset the locale to "C" after calling embedded Perl, in case it was changed
5065    (this can affect the format of dates).
5066
506728. exim_tidydb, when checking for the continued existence of a message for
5068    which it has found a message-specific retry record, was not finding
5069    messages that were in split spool directories. Consequently, it was
5070    deleting retry records that should have stayed in existence.
5071
507229. eximstats updated to version 1.35
5073    1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5074    1.35 - bugfix such that pie charts by volume are generated correctly
5075
507630. The SPA authentication driver was not abandoning authentication and moving
5077    on to the next authenticator when an expansion was forced to fail,
5078    contradicting the general specification for all authenticators. Instead it
5079    was generating a temporary error. It now behaves as specified.
5080
508131. The default ordering of permitted cipher suites for GnuTLS was pessimal
5082    (the order specifies the preference for clients). The order is now AES256,
5083    AES128, 3DES, ARCFOUR128.
5084
508531. Small patch to Sieve code - explicitly set From: when generating an
5086    autoreply.
5087
508832. Exim crashed if a remote delivery caused a very long error message to be
5089    recorded - for instance if somebody sent an entire SpamAssassin report back
5090    as a large number of 550 error lines. This bug was coincidentally fixed by
5091    increasing the size of one of Exim's internal buffers (big_buffer) that
5092    happened as part of the Exiscan merge. However, to be on the safe side, I
5093    have made the code more robust (and fixed the comments that describe what
5094    is going on).
5095
509633. Some experimental protocols are using DNS PTR records for new purposes. The
5097    keys for these records are domain names, not reversed IP addresses. The
5098    dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5099    leaves it alone. Component reversal etc. now happens only for IP addresses.
5100    CAN-2005-0021
5101
510234. The host_aton() function is supposed to be passed a string that is known
5103    to be a valid IP address. However, in the case of IPv6 addresses, it was
5104    not checking this. This is a hostage to fortune. Exim now panics and dies
5105    if the condition is not met. A case was found where this could be provoked
5106    from a dnsdb PTR lookup with an IPv6 address that had more than 8
5107    components; fortuitously, this particular loophole had already been fixed
5108    by change 4.50/55 or 4.44/33 above.
5109
5110    If there are any other similar loopholes, the new check in host_aton()
5111    itself should stop them being exploited. The report I received stated that
5112    data on the command line could provoke the exploit when Exim was running as
5113    exim, but did not say which command line option was involved. All I could
5114    find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5115    running as the user.
5116    CAN-2005-0021
5117
511835. There was a buffer overflow vulnerability in the SPA authentication code
5119    (which came originally from the Samba project). I have added a test to the
5120    spa_base64_to_bits() function which I hope fixes it.
5121    CAN-2005-0022
5122
512336. The daemon start-up calls getloadavg() while still root for those OS that
5124    need the first call to be done as root, but it missed one case: when
5125    deliver_queue_load_max is set with deliver_drop_privilege. This is
5126    necessary for the benefit of the queue runner, because there is no re-exec
5127    when deliver_drop_privilege is set.
5128
512937. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5130    was in use, was not putting the data itself into the right store pool;
5131    consequently, it could be overwritten for a subsequent message in the same
5132    SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5133    the caching.)
5134
513538. Sometimes the final signoff response after QUIT could fail to get
5136    transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5137    < 0 before doing a fflush(). This bug looks as though it goes back to the
5138    introduction of TLS in release 3.20, but "sometimes" must have been rare
5139    because the tests only now provoked it.
5140
5141
5142Exim version 4.43
5143-----------------
5144
5145 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5146    PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5147    Now it returns an integer. A number of calls were still expecting a T/F
5148    return. Fortuitously, in all cases, the tests worked in OK situations,
5149    which is the norm. However, things would have gone wrong on any write
5150    failures on the smtp file descriptor. This function is used when sending
5151    messages over SMTP and also when doing verify callouts.
5152
5153 2. When Exim is called to do synchronous delivery of a locally submitted
5154    message (the -odf or -odi options), it no longer closes stderr before doing
5155    the delivery.
5156
5157 3. Implemented the mua_wrapper option.
5158
5159 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5160
5161 5. Implemented the functions header_remove(), header_testname(),
5162    header_add_at_position(), and receive_remove_recipient(), and exported them
5163    to local_scan().
5164
5165 6. If an ACL "warn" statement specified the addition of headers, Exim already
5166    inserted X-ACL-Warn: at the start if there was no header name. However, it
5167    was not making this test for the second and subsequent header lines if
5168    there were newlines in the string. This meant that an invalid header could
5169    be inserted if Exim was badly configured.
5170
5171 7. Allow an ACL "warn" statement to add header lines at the start or after all
5172    the Received: headers, as well as at the end.
5173
5174 8. Added the rcpt_4xx retry error code.
5175
5176 9. Added postmaster_mailfrom=xxx to callout verification option.
5177
517810. Added mailfrom=xxxx to the callout verification option, for verify=
5179    header_sender only.
5180
518111. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5182    (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5183
518412. Inserted some casts to stop certain compilers warning when using pointer
5185    differences as field lengths or precisions in printf-type calls (mostly
5186    affecting debugging statements).
5187
518813. Added optional readline() support for -be (dynamically loaded).
5189
519014. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5191    same clock tick as a message's arrival, so that its received time was the
5192    same as the "first fail" time on the retry record, and that message
5193    remained on the queue past the ultimate address timeout, every queue runner
5194    would try a delivery (because it was past the ultimate address timeout) but
5195    after another failure, the ultimate address timeout, which should have then
5196    bounced the address, did not kick in. This was a "< instead of <=" error;
5197    in most cases the first failure would have been in the next clock tick
5198    after the received time, and all would be well.
5199
520015. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5201    being recognized when the domain list was tested by the match_domain
5202    condition in an expansion string.
5203
520416. Added the ${str2b64: operator.
5205
520617. Exim was always calling setrlimit() to set a large limit for the number of
5207    processes, without checking whether the existing limit was already
5208    adequate. (It did check for the limit on file descriptors.) Furthermore,
5209    errors from getrlimit() and setrlimit() were being ignored. Now they are
5210    logged to the main and panic logs, but Exim does carry on, to try to do its
5211    job under whatever limits there are.
5212
521318. Imported PCRE 5.0.
5214
521519. Trivial typo in log message " temporarily refused connection" (the leading
5216    space).
5217
521820. If the log selector return_path_on_delivery was set and an address was
5219    redirected to /dev/null, the delivery process crashed because it assumed
5220    that a return path would always be set for a "successful" delivery. In this
5221    case, the whole delivery is bypassed as an optimization, and therefore no
5222    return path is set.
5223
522421. Internal re-arrangement: the function for sending a challenge and reading
5225    a response while authentication was assuming a zero-terminated challenge
5226    string. It's now changed to take a pointer and a length, to allow for
5227    binary data in such strings.
5228
522922. Added the cyrus_sasl authenticator (code supplied by MBM).
5230
523123. Exim was not respecting finduser_retries when seeking the login of the
5232    uid under which it was called; it was always trying 10 times. (The default
5233    setting of finduser_retries is zero.) Also, it was sleeping after the final
5234    failure, which is pointless.
5235
523624. Implemented tls_on_connect_ports.
5237
523825. Implemented acl_smtp_predata.
5239
524026. If the domain in control=submission is set empty, Exim assumes that the
5241    authenticated id is a complete email address when it generates From: or
5242    Sender: header lines.
5243
524427. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5245    definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5246    chown and chgrp in /bin and hostname in /usr/bin.
5247
524828. Exim was keeping the "process log" file open after each use, just as it
5249    does for the main log. This opens the possibility of it remaining open for
5250    long periods when the USR1 signal hits a daemon. Occasional processlog
5251    errors were reported, that could have been caused by this. Anyway, it seems
5252    much more sensible not to leave this file open at all, so that is what now
5253    happens.
5254
525529. The long-running daemon process does not normally write to the log once it
5256    has entered its main loop, and it closes the log before doing so. This is
5257    so that log files can straightforwardly be renamed and moved. However,
5258    there are a couple of unusual error situations where the daemon does write
5259    log entries, and I had neglected to close the log afterwards.
5260
526130. The text of an SMTP error response that was received during a remote
5262    delivery was being truncated at 512 bytes. This is too short for some of
5263    the long messages that one sometimes sees. I've increased the limit to
5264    1024.
5265
526631. It is now possible to make retry rules that apply only when a message has a
5267    specific sender, in particular, an empty sender.
5268
526932. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5270    it possible to be selective about when SMTP synchronization is enforced.
5271
527233. Added "control = caseful_local_part" and "control = "caselower_local_part".
5273
527432. Implemented hosts_connection_nolog.
5275
527633. Added an ACL for QUIT.
5277
527834. Setting "delay_warning=" to disable warnings was not working; it gave a
5279    syntax error.
5280
528135. Added mailbox_size and mailbox_filecount to appendfile.
5282
528336. Added control = no_multiline_responses to ACLs.
5284
528537. There was a bug in the logic of the code that waits for the clock to tick
5286    in the case where the clock went backwards by a substantial amount such
5287    that the microsecond fraction of "now" was more than the microsecond
5288    fraction of "then" (but the whole seconds number was less).
5289
529038. Added support for the libradius Radius client library this is found on
5291    FreeBSD (previously only the radiusclient library was supported).
5292
5293
5294Exim version 4.42
5295-----------------
5296
5297 1. When certain lookups returned multiple values in the form name=value, the
5298    quoting of the values was not always being done properly. Specifically:
5299    (a) If the value started with a double quote, but contained no whitespace,
5300        it was not quoted.
5301    (b) If the value contained whitespace other than a space character (i.e.
5302        tabs or newlines or carriage returns) it was not quoted.
5303    This fix has been applied to the mysql and pgsql lookups by writing a
5304    separate quoting function and calling it from the lookup code. The fix
5305    should probably also be applied to nisplus, ibase and oracle lookups, but
5306    since I cannot test any of those, I have not disturbed their existing code.
5307
5308 2. A hit in the callout cache for a specific address caused a log line with no
5309    reason for rejecting RCPT. Now it says "Previous (cached) callout
5310    verification failure".
5311
5312 3. There was an off-by-one bug in the queryprogram router. An over-long
5313    return line was truncated at 256 instead of 255 characters, thereby
5314    overflowing its buffer with the terminating zero. As well as fixing this, I
5315    have increased the buffer size to 1024 (and made a note to document this).
5316
5317 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5318    when Exim is waiting for an SMTP response from a remote server, Exim
5319    restarts its select() call on the socket, thereby resetting its timeout.
5320    This is not a problem when such interrupts are rare. Somebody set up a cron
5321    job to run exiwhat every 2 minutes, which is less than the normal select()
5322    timeout (5 or 10 minutes). This meant that the select() timeout never
5323    kicked in because it was always reset. I have fixed this by comparing the
5324    time when an interrupt arrives with the time at the start of the first call
5325    to select(). If more time than the timeout has elapsed, the interrupt is
5326    treated as a timeout.
5327
5328 5. Some internal re-factoring in preparation for the addition of Sieve
5329    extensions (by MH). In particular, the "personal" test is moved to a
5330    separate function, and given an option for scanning Cc: and Bcc: (which is
5331    not set for Exim filters).
5332
5333 6. When Exim created an email address using the login of the caller as the
5334    local part (e.g. when creating a From: or Sender: header line), it was not
5335    quoting the local part when it contained special characters such as @.
5336
5337 7. Installed new OpenBSD configuration files.
5338
5339 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5340    try to make them clearer.
5341
5342 9. Callout options, other than the timeout value, were being ignored when
5343    verifying sender addresses in header lines. For example, when using
5344
5345      verify = header_sender/callout=no_cache
5346
5347    the cache was (incorrectly) being used.
5348
534910. Added a missing instance of ${EXE} to the exim_install script; this affects
5350    only the Cygwin environment.
5351
535211. When return_path_on_delivery was set as a log selector, if different remote
5353    addresses in the same message used different return paths and parallel
5354    remote delivery occurred, the wrong values would sometimes be logged.
5355    (Whenever a remote delivery process finished, the return path value from
5356    the most recently started remote delivery process was logged.)
5357
535812. RFC 3848 specifies standard names for the "with" phrase in Received: header
5359    lines when AUTH and/or TLS are in use. This is the "received protocol"
5360    field. Exim used to use "asmtp" for authenticated SMTP, without any
5361    indication (in the protocol name) for TLS use. Now it follows the RFC and
5362    uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5363    encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5364    names appear in log lines as well as in Received: header lines.
5365
536613. Installed MH's patches for Sieve to add the "copy" and "vacation"
5367    extensions, and comparison tests, and to fix some bugs.
5368
536914. Changes to the "personal" filter test:
5370
5371    (1) The test was buggy in that it was just doing the equivalent of
5372    "contains" tests on header lines. For example, if a user's address was
5373    anne@some.where, the "personal" test would incorrectly be true for
5374
5375      To: susanne@some.where
5376
5377    This test is now done by extracting each address from the header in turn,
5378    and checking the entire address. Other tests that are part of "personal"
5379    are now done using regular expressions (for example, to check local parts
5380    of addresses in From: header lines).
5381
5382    (2) The list of non-personal local parts in From: addresses has been
5383    extended to include "listserv", "majordomo", "*-request", and "owner-*",
5384    taken from the Sieve specification recommendations.
5385
5386    (3) If the message contains any header line starting with "List-" it is
5387    treated as non-personal.
5388
5389    (4) The test for "circular" in the Subject: header line has been removed
5390    because it now seems ill-conceived.
5391
539215. Minor typos in src/EDITME comments corrected.
5393
539416. Installed latest exipick from John Jetmore.
5395
539617. If headers_add on a router specified a text string that was too long for
5397    string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5398    of string_sprintf() is now avoided.
5399
540018. $message_body_size was not set (it was always zero) when running the DATA
5401    ACL and the local_scan() function.
5402
540319. For the "mail" command in an Exim filter, no default was being set for
5404    the once_repeat time, causing a random time value to be used if "once" was
5405    specified. (If the value happened to be <= 0, no repeat happened.) The
5406    default is now 0s, meaning "never repeat". The "vacation" command was OK
5407    (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5408    (I found it when inspecting the code).
5409
541020. There is now an overall timeout for performing a callout verification. It
5411    defaults to 4 times the callout timeout, which applies to individual SMTP
5412    commands during the callout. The overall timeout applies when there is more
5413    than one host that can be tried. The timeout is checked before trying the
5414    next host. This prevents very long delays if there are a large number of
5415    hosts and all are timing out (e.g. when the network connections are timing
5416    out). The value of the overall timeout can be changed by specifying an
5417    additional sub-option for "callout", called "maxwait". For example:
5418
5419      verify = sender/callout=5s,maxwait=20s
5420
542121. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5422    to the end before writing, but this should make it even safer).
5423
542422. Exim was forgetting that it had advertised PIPELINING for the second and
5425    subsequent messages on an SMTP connection. It was also not resetting its
5426    memory on STARTTLS and an internal HELO.
5427
542823. When Exim logs an SMTP synchronization error within a session, it now
5429    records whether PIPELINING has been advertised or not.
5430
543124. Added 3 instances of "(long int)" casts to time_t variables that were being
5432    formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5433    rather than long int.
5434
543525. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5436
543726. Added the never_mail option to autoreply.
5438
5439
5440Exim version 4.41
5441-----------------
5442
5443 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5444    crash if the getsockname() call failed; this can happen if a connection is
5445    closed very soon after it is established. The problem was simply in the
5446    order in which certain operations were done, causing Exim to try to write
5447    to the SMTP stream before it had set up the file descriptor. The bug has
5448    been fixed by making things happen in the correct order.
5449
5450
5451Exim version 4.40
5452-----------------
5453
5454 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5455    before the connection was closed, thus losing the rejection response.
5456
5457 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5458    some early Solaris releases, but causes trouble in current releases where
5459    socklen_t is defined.
5460
5461 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5462    always exist.
5463
5464 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5465    configured.
5466
5467 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5468    that releasing the top of it at the end releases what was used for sub-
5469    expansions (unless the block got too big). However, discard this block if
5470    the first thing is a variable or header, so that we can use its block when
5471    it is dynamic (useful for very large $message_headers, for example).
5472
5473 6. Lookups now cache *every* query, not just the most recent. A new, separate
5474    store pool is used for this. It can be recovered when all lookup caches are
5475    flushed. Lookups now release memory at the end of their result strings.
5476    This has involved some general refactoring of the lookup sources.
5477
5478 7. Some code has been added to the store_xxx() functions to reduce the amount
5479    of flapping under certain conditions.
5480
5481 8. log_incoming_interface used to affect only the <= reception log lines. Now
5482    it causes the local interface and port to be added to several more SMTP log
5483    lines, for example "SMTP connection from", and rejection lines.
5484
5485 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5486
548710. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5488
548911. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5490    could be overwritten at the end of the current message (or the start of a
5491    new message if it was set in a HELO ACL). The value is now preserved for
5492    the duration of the SMTP connection.
5493
549412. If a transport had a headers_rewrite setting, and a matching header line
5495    contained an unqualified address, that address was qualified, even if it
5496    did not match any rewriting rules. The underlying bug was that the values
5497    of the flags that permit the existence of unqualified sender and recipient
5498    addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5499    non-local messages, and by -bnq for local messages) were not being
5500    preserved with the message after it was received.
5501
550213. When Exim was logging an SMTP synchronization error, it could sometimes log
5503    "next input=" as part of the text comprising the host identity instead of
5504    the correct text. The code was using the same buffer for two different
5505    strings. However, depending on which order the printing function evaluated
5506    its arguments, the bug did not always show up. Under Linux, for example, my
5507    test suite worked just fine.
5508
550914. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5510    doesn't work with some older versions of Perl. It has been changed to "my",
5511    which in any case is probably the better facility to use.
5512
551315. A really picky compiler found some instances of statements for creating
5514    error messages that either had too many or two few arguments for the format
5515    string.
5516
551716. The size of the buffer for calls to the DNS resolver has been increased
5518    from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5519    for addresses that have a lot of PTR records. This alleviates a problem; it
5520    does not fully solve it.
5521
552217. A dnsdb lookup for PTR records that receives more data than will fit in the
5523    buffer now truncates the list and logs the incident, which is the same
5524    action as happens when Exim is looking up a host name and its aliases.
5525    Previously in this situation something unpredictable would happen;
5526    sometimes it was "internal error: store_reset failed".
5527
552818. If a server dropped the connection unexpectedly when an Exim client was
5529    using GnuTLS and trying to read a response, the client delivery process
5530    crashed while trying to generate an error log message.
5531
553219. If a "warn" verb in an ACL added multiple headers to a message in a single
5533    string, for example:
5534
5535      warn message = H1: something\nH2: something
5536
5537    the text was added as a single header line from Exim's point of view
5538    though it ended up OK in the delivered message. However, searching for the
5539    second and subsequent header lines using $h_h2: did not work. This has been
5540    fixed. Similarly, if a system filter added multiple headers in this way,
5541    the routers could not see them.
5542
554320. Expanded the error message when iplsearch is called with an invalid key to
5544    suggest using net-iplsearch in a host list.
5545
554621. When running tests using -bh, any delays imposed by "delay" modifiers in
5547    ACLs are no longer actually imposed (and a message to that effect is
5548    output).
5549
555022. If a "gecos" field in a passwd entry contained escaped characters, in
5551    particular, if it contained a \" sequence, Exim got it wrong when building
5552    a From: or a Sender: header from that name. A second bug also caused
5553    incorrect handling when an unquoted " was present following a character
5554    that needed quoting.
5555
555623. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5557    was not being matched caselessly.
5558
555924. Arranged for all hyphens in the exim.8 source to be escaped with
5560    backslashes.
5561
556225. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5563    properly. Recipient callout cache records were still being keyed to include
5564    the sender, even when use_sender was set false. This led to far more
5565    callouts that were necessary. The sender is no longer included in the key
5566    when use_sender is false.
5567
556826. Added "control = submission" modifier to ACLs.
5569
557027. Added the ${base62d: operator to decode base 62 numbers.
5571
557228. dnsdb lookups can now access SRV records.
5573
557429. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5575    the configuration file.
5576
557730. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5578    (-v) mode. This makes the output for a verbose queue run more intelligible.
5579
558031. Added a use_postmaster feature to recipient callouts.
5581
558232. Added the $body_zerocount variable, containing the number of binary zero
5583    bytes in the message body.
5584
558533. The time of last modification of the "new" subdirectory is now used as the
5586    "mailbox time last read" when there is a quota error for a maildir
5587    delivery.
5588
558934. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5590
559135. Added +ignore_unknown as a special item in host lists.
5592
559336. Code for decoding IPv6 addresses in host lists is now included, even if
5594    IPv6 support is not being compiled. This fixes a bug in which an IPv6
5595    address was recognized as an IP address, but was then not correctly decoded
5596    into binary, causing unexpected and incorrect effects when compared with
5597    another IP address.
5598
5599
5600Exim version 4.34
5601-----------------
5602
5603 1. Very minor rewording of debugging text in manualroute to say "list of
5604    hosts" instead of "hostlist".
5605
5606 2. If verify=header_syntax was set, and a header line with an unqualified
5607    address (no domain) and a large number of spaces between the end of the
5608    name and the colon was received, the reception process suffered a buffer
5609    overflow, and (when I tested it) crashed. This was caused by some obsolete
5610    code that should have been removed. The fix is to remove it!
5611
5612 3. When running in the test harness, delay a bit after writing a bounce
5613    message to get a bit more predictability in the log output.
5614
5615 4. Added a call to search_tidyup() just before forking a reception process. In
5616    theory, someone could use a lookup in the expansion of smtp_accept_max_
5617    per_host which, without the tidyup, could leave open a database connection.
5618
5619 5. Added the variables $recipient_data and $sender_data which get set from a
5620    lookup success in an ACL "recipients" or "senders" condition, or a router
5621    "senders" option, similar to $domain_data and $local_part_data.
5622
5623 6. Moved the writing of debug_print from before to after the "senders" test
5624    for routers.
5625
5626 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5627    problems for message scanning, either using a data ACL, or using
5628    local_scan() because the Received: header was not generated till after they
5629    were called (in order to set the time as the time of reception completion).
5630    I have revised the way this works. The header is now generated after the
5631    body is received, but before the ACL or local_scan() are called. After they
5632    are run, the timestamp in the header is updated.
5633
5634
5635Exim version 4.33
5636-----------------
5637
5638 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5639    before starting a queue runner without re-exec. This happened only when
5640    deliver_drop_privilege was set or when the Exim user was set to root. The
5641    effect of the bug was that timeouts during subsequent deliveries caused
5642    crashes instead of being properly handled. The handler is now left at its
5643    default (and expected) setting.
5644
5645 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5646    message, again when deliver_drop_privilege is set or Exim is run as root.
5647    The bug described in (1) was not present in this case, but the tidying up
5648    of the other signals was missing. I have made the two cases consistent.
5649
5650 3. The ignore_target_hosts setting on a manualroute router was being ignored
5651    for hosts that were looked up using the /MX notation.
5652
5653 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5654    in domain lists.
5655
5656 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5657    operated on the sender address. After changing the $sender_address to <>
5658    for the sender address verify, Exim was re-instated it as the original
5659    (before rewriting) address, but remembering that it had rewritten it, so it
5660    wasn't rewriting it again. This bug also had the effect of breaking the
5661    sender address verification caching when the sender address was rewritten.
5662
5663 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5664    This has been changed so that if the ip literal address matches
5665    ignore_target_hosts, the router declines.
5666
5667 7. Added expansion conditions match_domain, match_address, and match_local_
5668    part (NOT match_host).
5669
5670 8. The placeholder for the Received: header didn't have a length field set.
5671
5672 9. Added code to Exim itself and to exim_lock to test for a specific race
5673    condition that could lead to file corruption when using MBX delivery. The
5674    issue is with the lockfile that is created in /tmp. If this file is removed
5675    after a process has opened it but before that process has acquired a lock,
5676    there is the potential for a second process to recreate the file and also
5677    acquire a lock. This could lead to two Exim processes writing to the file
5678    at the same time. The added code performs the same test as UW imapd; it
5679    checks after acquiring the lock that its file descriptor still refers to
5680    the same named file.
5681
568210. The buffer for building added header lines was of fixed size, 8192 bytes.
5683    It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5684    when Exim is built.
5685
568611. Added the smtp_active_hostname option. If used, this will typically be made
5687    to depend on the incoming interface address. Because $interface_address is
5688    not set up until the daemon has forked a reception process, error responses
5689    that can happen earlier (such as "too many connections") no longer contain
5690    a host name.
5691
569212. If an expansion in a condition on a "warn" statement fails because a lookup
5693    defers, the "warn" statement is abandoned, and the next ACL statement is
5694    processed. Previously this caused the whole ACL to be aborted.
5695
569613. Added the iplsearch lookup type.
5697
569814. Added ident_timeout as a log selector.
5699
570015. Added tls_certificate_verified as a log selector.
5701
570216. Added a global option tls_require_ciphers (compare the smtp transport
5703    option of the same name). This controls incoming TLS connections.
5704
570517. I finally figured out how to make tls_require_ciphers do a similar thing
5706    in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5707    before starting the TLS session.
5708
570918. Tabs are now shown as \t in -bP output.
5710
571119. If the log selector return_path_on_delivery was set, Exim crashed when
5712    bouncing a message because it had too many Received: header lines.
5713
571420. If two routers both had headers_remove settings, and the first one included
5715    a superfluous trailing colon, the final name in the first list and the
5716    first name in the second list were incorrectly joined into one item (with a
5717    colon in the middle).
5718
5719
5720Exim version 4.32
5721-----------------
5722
5723 1. Added -C and -D options to the exinext utility, mainly to make it easier
5724    to include in the automated testing, but these could be helpful when
5725    multiple configurations are in use.
5726
5727 2. The exinext utility was not formatting the output nicely when there was
5728    an alternate port involved in the retry record key, nor when there was a
5729    message id as well (for retries that were specific to a specific message
5730    and a specific host). It was also confused by IPv6 addresses, because of
5731    the additional colons they contain. I have fixed the IPv4 problem, and
5732    patched it up to do a reasonable job for IPv6.
5733
5734 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5735    delivery, the log line now contains "pipelined" if PIPELINING was used.
5736
5737 4. An SMTP transport process used to panic and die if the bind() call to set
5738    an explicit outgoing interface failed. This has been changed; it is now
5739    treated in the same way as a connect() failure.
5740
5741 5. A reference to $sender_host_name in the part of a conditional expansion
5742    that was being skipped was still causing a DNS lookup. This no longer
5743    occurs.
5744
5745 6. The def: expansion condition was not recognizing references to header lines
5746    that used bh_ and bheader_.
5747
5748 7. Added the _cache feature to named lists.
5749
5750 8. The code for checking quota_filecount in the appendfile transport was
5751    allowing one more file than it should have been.
5752
5753 9. For compatibility with Sendmail, the command line option
5754
5755      -prval:sval
5756
5757    is equivalent to
5758
5759      -oMr rval -oMs sval
5760
5761    and sets the incoming protocol and host name (for trusted callers). The
5762    host name and its colon can be omitted when only the protocol is to be set.
5763    Note the Exim already has two private options, -pd and -ps, that refer to
5764    embedded Perl. It is therefore impossible to set a protocol value of "d" or
5765    "s", but I don't think that's a major issue.
5766
576710. A number of refactoring changes to the code, none of which should affect
5768    Exim's behaviour:
5769
5770    (a) The number of logging options was getting close to filling up the
5771    32-bit word that was used as a bit map. I have split them into two classes:
5772    those that are passed in the argument to log_write(), and those that are
5773    only ever tested independently outside of that function. These are now in
5774    separate 32-bit words, so there is plenty of room for expansion again.
5775    There is no change in the user interface or the logging behaviour.
5776
5777    (b) When building, for example, log lines, the code previously used a
5778    macro that called string_cat() twice, in order to add two strings. This is
5779    not really sufficiently general. Furthermore, there was one instance where
5780    it was actually wrong because one of the argument was used twice, and in
5781    one call a function was used. (As it happened, calling the function twice
5782    did not affect the overall behaviour.) The macro has been replaced by a
5783    function that can join an arbitrary number of extra strings onto a growing
5784    string.
5785
5786    (c) The code for expansion conditions now uses a table and a binary chop
5787    instead of a serial search (which was left over from when there were very
5788    few conditions). Also, it now recognizes conditions like "pam" even when
5789    the relevant support is not compiled in: a suitably worded error message is
5790    given if an attempt is made to use such a condition.
5791
579211. Added ${time_interval:xxxxx}.
5793
579412. A bug was causing one of the ddress fields not to be passed back correctly
5795    from remote delivery subprocesses. The field in question was not being
5796    subsequently used, so this caused to problems in practice.
5797
579813. Added new log selectors queue_time and deliver_time.
5799
580014. Might have fixed a bug in maildirsizefile handling that threw up
5801    "unexpected character" debug warnings, and recalculated the data
5802    unnecessarily. In any case, I expanded the warning message to give more
5803    information.
5804
580515. Added the message "Restricted characters in address" to the statements in
5806    the default ACL that block characters like @ and % in local parts.
5807
580816. Change 71 for release 4.31 proved to be much less benign that I imagined.
5809    Three changes have been made:
5810
5811    (a) There was a serious bug; a negative response to MAIL caused the whole
5812        recipient domain to be cached as invalid, thereby blocking all messages
5813        to all local parts at the same domain, from all senders. This bug has
5814        been fixed. The domain is no longer cached after a negative response to
5815        MAIL if the sender used is not empty.
5816
5817    (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
5818        been restored.
5819
5820    (c) A new callout option, "use_sender" has been added for people who want
5821        the modified behaviour.
5822
5823
5824Exim version 4.31
5825-----------------
5826
5827 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
5828    Larry Rosenman.
5829
5830 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
5831    indeed breaks things for older releases.
5832
5833 3. Added additional logging to the case where there is a problem reading data
5834    from a filter that is running in a subprocess using a pipe, in order to
5835    try to track down a specific problem.
5836
5837 4. Testing facility fudge: when running in the test harness and attempting
5838    to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
5839    getting "No route to host". Convert this to a timeout.
5840
5841 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
5842    warning.
5843
5844 6. Some OS don't have socklen_t but use size_t instead. This affects the
5845    fifth argument of getsockopt() amongst other things. This is now
5846    configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
5847    can be set for individual OS. I have set it for SunOS5, OSF1, and
5848    Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
5849    some earlier ones do not.
5850
5851 7. Change 4.30/15 was not doing the test caselessly.
5852
5853 8. The standard form for an IPv6 address literal was being rejected by address
5854    parsing in, for example, MAIL and RCPT commands. An example of this kind of
5855    address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5856    this, as well as the form without the "IPv6" on the front (but only when
5857    address literals are enabled, of course).
5858
5859 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
5860
586110. Exim crashed if a message with an empty sender address specified by -f
5862    encountered a router with an errors_to setting. This could be provoked only
5863    by a command such as
5864
5865      exim -f "" ...
5866
5867    where an empty string was supplied; "<>" did not hit this bug.
5868
586911. Installed PCRE release 4.5.
5870
587112. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
5872    remained set. It is now erased.
5873
587413. exiqgrep wasn't working on MacOS X because it didn't correctly compute
5875    times from message ids (which are base 36 rather than the normal 62).
5876
587714. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
5878    were being counted as actual protocol errors, and logged if the log
5879    selector +smtp_protocol_error was set. One cannot be perfect in this test,
5880    but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
5881    and DATA following a set of rejected RCPTs do not count as protocol errors.
5882    In other words, Exim assumes they were pipelined, though this may not
5883    actually be the case. Of course, in all cases the client gets an
5884    appropriate error code.
5885
588615. If a lookup fails in an ACL condition, a message about the failure may
5887    be available; it is used if testing the ACL cannot continue, because most
5888    such messages specify what the cause of the deferral is. However, some
5889    messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
5890    that caused an old message to be retained and used if a later statement
5891    caused a defer, replacing the real cause of the deferral.
5892
589316. If an IP address had so many PTR records that the DNS lookup buffer
5894    was not large enough to hold them, Exim could crash while trying to process
5895    the truncated data. It now detects and logs this case.
5896
589717. Further to 4.21/58, another change has been made: if (and only if) the
5898    first line of a message (the first header line) ends with CRLF, a bare LF
5899    in a subsequent header line has a space inserted after it, so as not to
5900    terminate the header.
5901
590218. Refactoring: tidied an ugly bit of code in appendfile that copied data
5903    unnecessarily, used atoi() instead of strtol(), and didn't check the
5904    termination when getting file sizes from file names by regex.
5905
590619. Completely re-implemented the support for maildirsize files, in the light
5907    of a number of problems with the previous contributed implementation
5908    (4.30/29). In particular:
5909
5910    . If the quota is zero, the maildirsize file is maintained, but no quota is
5911      imposed.
5912
5913    . If the maildir directory does not exist, it is created before any attempt
5914      to write a maildirsize file.
5915
5916    . The quota value in the file is just a cache; if the quota is changed in
5917      the transport, the new value overrides.
5918
5919    . A regular expression is available for excluding directories from the
5920      count.
5921
592220. The autoreply transport checks the characters in options that define the
5923    message's headers; it allows continued headers, but it was checking with
5924    isspace() after an embedded newline instead of explicitly looking for a
5925    space or a tab.
5926
592721. If all the "regular" hosts to which an address was routed had passed their
5928    expiry times, and had not reached their retry times, the address was
5929    bounced, even if fallback hosts were defined. Now Exim should go on to try
5930    the fallback hosts.
5931
593222. Increased buffer sizes in the callout code from 1024 to 4096 to match the
5933    equivalent code in the SMTP transport. Some hosts send humungous responses
5934    to HELO/EHLO, more than 1024 it seems.
5935
593623. Refactoring: code in filter.c used (void *) for "any old type" but this
5937    gives compiler warnings in some environments. I've now done it "properly",
5938    using a union.
5939
594024. The replacement for inet_ntoa() that is used with gcc on IRIX systems
5941    (because of problems with the built-in one) was declared to return uschar *
5942    instead of char *, causing compiler failure.
5943
594425. Fixed a file descriptor leak when processing alias/forward files.
5945
594626. Fixed a minor format string issue in dbfn.c.
5947
594827. Typo in exim.c: ("dmbnz" for "dbmnz").
5949
595028. If a filter file refered to $h_xxx or $message_headers, and the headers
5951    contained RFC 2047 "words", Exim's memory could, under certain conditions,
5952    become corrupted.
5953
595429. When a sender address is verified, it is cached, to save repeating the test
5955    when there is more than one recipient in a message. However, when the
5956    verification involves a callout, it is possible for different callout
5957    options to be set for different recipients. It is too complicated to keep
5958    track of this in the cache, so now Exim always runs a verification when a
5959    callout is required, relying on the callout cache for the optimization.
5960    The overhead is duplication of the address routing, but this should not be
5961    too great.
5962
596330. Fixed a bug in callout caching. If a RCPT command caused the sender address
5964    to be verified with callout=postmaster, and the main callout worked but the
5965    postmaster check failed, the verification correctly failed. However, if a
5966    subsequent RCPT command asked for sender verification *without* the
5967    postmaster check, incorrect caching caused this verification also to fail,
5968    incorrectly.
5969
597031. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
5971    it was not caching the DNS options (qualify_single, search_parents) that
5972    were used when the lookup failed. A subsequent lookup with different
5973    options therefore always gave the same answer, though there were cases
5974    where it should not have. (Example: a "domains = !$mx_any" option on a
5975    dnslookup router: the "domains" option is always processed without any
5976    widening, but the router might have qualify_single set.) Now Exim uses the
5977    cached value only when the same options are set.
5978
597932. Added John Jetmore's "exipick" utility to the distribution.
5980
598133. GnuTLS: When an attempt to start a TLS session fails for any reason other
5982    than a timeout (e.g. a certificate is required, and is not provided), an
5983    Exim server now closes the connection immediately. Previously it waited for
5984    the client to close - but if the client is SSL, it seems that they each
5985    wait for each other, leading to a delay before one of them times out.
5986
598734: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
5988    maintained 0.8.x compatibility because I don't think many are using it, and
5989    it is clearly obsolete.
5990
599135. Added TLS support for CRLs: a tls_crl global option and one for the smtp
5992    transport.
5993
599436. OpenSSL: $tls_certificate_verified was being set to 1 even if the
5995    client certificate was expired. A simple patch fixes this, though I don't
5996    understand the full logic of why the verify callback is called multiple
5997    times.
5998
599937. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6000    Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6001    which causes problems with some clients (such as the Certicom SSL Plus
6002    library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6003    disables the coutermeasure allowing Eudora to connect."
6004
600538. Exim was not checking that a write() to a log file succeeded. This could
6006    lead to Bad Things if a log got too big, in particular if it hit a file
6007    size limit. Exim now panics and dies if it cannot write to a log file, just
6008    as it does if it cannot open a log file.
6009
601039. Modified OS/Makefile-Linux so that it now contains
6011
6012      CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6013
6014    The two -D definitions ensure that Exim is compiled with large file
6015    support, which makes it possible to handle log files that are bigger than
6016    2^31.
6017
601840. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6019    instance) a domain was checked against a named list that involved a lookup,
6020    causing $domain_data to be set, then another domain was checked against the
6021    same list, then the first domain was re-checked, the value of $domain_data
6022    after the final check could be wrong. In particular, if the second check
6023    failed, it could be set empty. This bug probably also applied to
6024    $localpart_data.
6025
602641. The strip_trailing_dot option was not being applied to the address given
6027    with the -f command-line option.
6028
602942. The code for reading a message's header from the spool was incrementing
6030    $received_count, but never initializing it. This meant that the value was
6031    incorrect (doubled) while delivering a message in the same process in which
6032    it was received. In the most common configuration of Exim, this never
6033    happens - a fresh exec is done - but it can happen when
6034    deliver_drop_privilege is set.
6035
603643. When Exim logs an SMTP synchronization error - client data sent too soon -
6037    it now includes up to 150 characters of the unexpected data in the log
6038    line.
6039
604044. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6041    and building data strings. The size of both of these buffers was 10 000
6042    bytes - far larger than anybody would *ever* want, thought I. Needless to
6043    say, somebody hit the limit. I have increased the maximum line length to
6044    20 000 and the maximum data length of concatenated lines to 100 000. I have
6045    also fixed two bugs, because there was no checking on these buffers. Tsk,
6046    tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6047    buffer is too small.
6048
604945. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6050    lsearch lookups. Now it does.
6051
605246. When parsing a route_list item in a manualroute router, a fixed-length
6053    buffer was used for the list of hosts. I made this 1024 bytes long,
6054    thinking that nobody would ever have a list of hosts that long. Wrong.
6055    Somebody had a whole pile of complicated expansion conditions, and the
6056    string was silently truncated, leading to an expansion error. It turns out
6057    that it is easier to change to an unlimited length (owing to other changes
6058    that have happened since this code was originally written) than to build
6059    structure for giving a limitation error. The length of the item that
6060    expands into the list of hosts is now unlimited.
6061
606247. The lsearch lookup could not handle data where the length of text line was
6063    more than 4095 characters. Such lines were truncated, leading to shortened
6064    data being returned. It should now handle lines of any length.
6065
606648. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6067    xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6068    ACL").
6069
607049. Cosmetic tidy to scripts like exicyclog that are generated by globally
6071    replacing strings such as BIN_DIRECTORY in a source file: the replacement
6072    no longer happens in comment lines. A list of replacements is now placed
6073    at the head of all of the source files, except those whose only change is
6074    to replace PERL_COMMAND in the very first #! line.
6075
607650. Replaced the slow insertion sort in queue.c, for sorting the list of
6077    messages on the queue, with a bottom-up merge sort, using code contributed
6078    by Michael Haardt. This should make operations like -bp somewhat faster on
6079    large queues. It won't affect queue runners, except when queue_run_in_order
6080    is set.
6081
608251. Installed eximstats 1.31 in the distribution.
6083
608452. Added support for SRV lookups to the dnslookup router.
6085
608653. If an ACL referred to $message_body or $message_body_end, the value was not
6087    reset for any messages that followed in the same SMTP session.
6088
608954. The store-handling optimization for building very long strings was not
6090    differentiating between the different store pools. I don't think this
6091    actually made any difference in practice, but I've tidied it.
6092
609355. While running the routers to verify a sender address, $sender_address
6094    was still set to the sender address. This is wrong, because when routing to
6095    send a bounce to the sender, it would be empty. Therefore, I have changed
6096    it so that, while verifying a sender address, $sender_address is set to <>.
6097    (There is no change to what happens when verifying a recipient address.)
6098
609956. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6100    target A or AAAA records (if not already returned) without resetting the
6101    qualify_single or search_parents options of the DNS resolver. These are
6102    inappropriate in this case because the targets of MX and SRV records must
6103    be FQDNs. A broken DNS record could cause trouble if it happened to have a
6104    target that, when qualified, matched something in the local domain. These
6105    two options are now turned off when doing these lookups.
6106
610757. It seems that at least some releases of Reiserfs (which does not have the
6108    concept of a fixed number of inodes) returns zero and not -1 for the
6109    number of available inodes. This interacted badly with check_spool_inodes,
6110    which assumed that -1 was the "no such thing" setting. What I have done is
6111    to check that the total number of inodes is greater than zero before doing
6112    the test of how many are available.
6113
611458. When a "warn" ACL statement has a log_message modifier, the message is
6115    remembered, and not repeated. This is to avoid a lot of repetition when a
6116    message has many recipients that cause the same warning to be written.
6117    However, Exim was preserving the list of already written lines for an
6118    entire SMTP session, which doesn't seem right. The memory is now reset if a
6119    new message is started.
6120
612159. The "rewrite" debugging flag was not showing the result of rewriting in the
6122    debugging output unless log_rewrite was also set.
6123
612460. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6125    of (int)(handle) when we know that handle contains (void *)(-1).
6126
612761. The Exim daemon panic-logs an error return when it closes the incoming
6128    connection. However "connection reset by peer" seems to be common, and
6129    isn't really an error worthy of noting specially, so that particular error
6130    is no long logged.
6131
613262. When Exim is trying to find all the local interfaces, it used to panic and
6133    die if the ioctl to get the interface flags failed. However, it seems that
6134    on at least one OS (Solaris 9) it is possible to have an interface that is
6135    included in the list of interfaces, but for which you get a failure error
6136    for this call. This happens when the interface is not "plumbed" into a
6137    protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6138    failure of the "get flags" call assumes that the interface is down.
6139
614063. Added a ${eval10: operator, which assumes all numbers are decimal. This
6141    makes life easier for people who are doing arithmetic on fields extracted
6142    from dates, where you often get leading zeros that should not be
6143    interpreted as octal.
6144
614564. Added qualify_domain to the redirect router, to override the global
6146    setting.
6147
614865. If a pathologically long header line contained very many addresses (the
6149    report of this problem mentioned 10 000) and each of them was rewritten,
6150    Exim could use up a very large amount of memory. (It kept on making new
6151    copies of the header line as it rewrote, and never released the old ones.)
6152    At the expense of a bit more processing, the header rewriting function has
6153    been changed so that it no longer eats memory in this way.
6154
615566. The generation of the Received: header has been moved from the time that a
6156    message starts to be received, to the time that it finishes. The timestamp
6157    in the Received: header should now be very close to that of the <= log
6158    line. There are two side-effects of this change:
6159
6160    (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6161        logged header lines no longer include the local Received: line, because
6162        it has not yet been created. The same applies to a copy of the message
6163        that is returned to a non-SMTP sender when a message is rejected.
6164
6165    (b) When a filter file is tested using -bf, no additional Received: header
6166        is added to the test message. After some thought, I decided that this
6167        is a bug fix.
6168
6169    This change does not affect the value of $received_for. It is still set
6170    after address rewriting, but before local_scan() is called.
6171
617267. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6173
617468. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6175    gave an unhelpful panic error message, and a defer error. I have managed to
6176    change this behaviour so that it now rejects any supplied certificate,
6177    which seems right, as the list of acceptable certificates is empty.
6178
617969. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6180    gave an unhelpful defer error. I have not managed to make this reject any
6181    supplied certificates, but the error message it gives is "no certificate
6182    supplied", which is not helpful.
6183
618470. exigrep's output now also includes lines that are not associated with any
6185    message, but which match the given pattern. Implemented by a patch from
6186    Martin Sluka, which also tidied up the Perl a bit.
6187
618871. Recipient callout verification, like sender verification, was using <> in
6189    the MAIL FROM command. This isn't really the right thing, since the actual
6190    sender may affect whether the remote host accepts the recipient or not. I
6191    have changed it to use the actual sender in the callout; this means that
6192    the cache record is now keyed on a recipient/sender pair, not just the
6193    recipient address. There doesn't seem to be a real danger of callout loops,
6194    since a callout by the remote host to check the sender would use <>.
6195    [SEE ABOVE: changed after hitting problems.]
6196
619772. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6198    temporary errors. However, in the case of such a code being given after
6199    the end of a data transmission (i.e. after ".") Exim was failing to write
6200    a retry record for the message. (Yes, there was some broken host that was
6201    actually sending 8xx at this point.)
6202
620373. An unknown lookup type in a host list could cause Exim to panic-die when
6204    the list was checked. (An example that provoked this was putting <; in the
6205    middle of a list instead of at the start.) If this happened during a DATA
6206    ACL check, a -D file could be left lying around. This kind of configuration
6207    error no longer causes Exim to die; instead it causes a defer error. The
6208    incident is still logged to the main and panic logs.
6209
621074. Buglet left over from Exim 3 conversion. The message "too many messages
6211    in one connection" was written to the rejectlog but not the mainlog, except
6212    when address rewriting (yes!) was being logged.
6213
621475. Added write_rejectlog option.
6215
621676. When a system filter was run not as root (that is, when system_filter_user
6217    was set), the values of the $n variables were not being returned to the
6218    main process; thus, they were not subsequently available in the $sn
6219    variables.
6220
622177. Added +return_path_on_delivery log selector.
6222
622378. A connection timeout was being treated differently from recipients deferred
6224    when testing hosts_max_try with a message that was older than the host's
6225    retry timeout. (The host should not be counted, thus allowing all hosts to
6226    be tried at least once before bouncing.) This may have been the cause of an
6227    occasionally reported bug whereby a message would remain on the queue
6228    longer than the retry timeout, but would be bounced if a delivery was
6229    forced. I say "may" because I never totally pinned down the problem;
6230    setting up timeout/retry tests is difficult. See also the next item.
6231
623279. The ultimate address timeout was not being applied to errors that involved
6233    a combination of host plus message (for example, a timeout on a MAIL
6234    command). When an address resolved to a number of possible hosts, and they
6235    were not all tried for each delivery (e.g. because of hosts_max_try), a
6236    message could remain on the queue longer than the retry timeout.
6237
623880. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6239    Haardt.
6240
624181. Fixed an obscure SMTP outgoing bug which required at least the following
6242    conditions: (a) there was another message waiting for the same server;
6243    (b) the server returned 5xx to all RCPT commands in the first message so
6244    that the message was not completed; (c) the server dropped the connection
6245    or gave a negative response to the RSET that Exim sends to abort the
6246    transaction. The observed case was a dropped connection after DATA that had
6247    been sent in pipelining mode. That is, the server had advertised PIPELINING
6248    but was not implementing it correctly. The effect of the bug was incorrect
6249    behaviour, such as trying another host, and this could lead to a crash.
6250
6251
6252Exim version 4.30
6253-----------------
6254
6255 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6256    and daemon.c were passed as pointers to ints; they should have been
6257    pointers to socklen_t variables (which are typically unsigned ints).
6258
6259 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6260    fixed.
6261
6262 3. Fixed a really odd bug that affected only the testing scheme; patching a
6263    certain fixed string in the binary changed the value of another string that
6264    happened to be identical to the end of the original first string.
6265
6266 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6267    name", it returns that address as the IP address. On some operating
6268    systems (e.g. Solaris), it also passes back the IP address string as the
6269    "host name". However, on others (e.g. Linux), it passes back an empty
6270    string. Exim wasn't checking for this, and was changing the host name to an
6271    empty string, assuming it had been canonicalized.
6272
6273 5. Although rare, it is permitted to have more than one PTR record for a given
6274    IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6275    all the names associated with an address, because they do in Solaris.
6276    However, it seems that they do not in Linux for data that comes from the
6277    DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6278    I found this out when I moved to a new Linux workstation and tried to run
6279    the Exim test suite.
6280
6281    To get round this problem I have changed the code so that it now does its
6282    own call to the DNS to look up PTR records when searching for a host name.
6283    If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6284    addresses that are only in /etc/hosts are still found.
6285
6286    This behaviour is, however, controlled by an option called host_lookup_
6287    order, which defaults to "bydns:byaddr". If people want to use the other
6288    order, or indeed, just use one or the other means of lookup, they can
6289    specify it in this variable.
6290
6291 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6292    some operating systems, this comes back from gethostbyaddr() as an empty
6293    string, and this is what Exim used to test for. However, it seems that in
6294    other systems, "." is yielded. Exim now tests for this case too.
6295
6296 7. The values of check_spool_space and check_log_space are now held internally
6297    as a number of kilobytes instead of an absolute number of bytes. If a
6298    numbers is specified without 'K' or 'M', it is rounded up to the nearest
6299    kilobyte. This means that much larger values can be stored.
6300
6301 8. Exim monitor: an attempt to get the action menu when not actually pointing
6302    at a message produces an empty menu entitled "No message selected". This
6303    works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6304    no entries in it ("Shell widget menu has zero width and/or height"). So I
6305    have added a single, blank menu entry in this case.
6306
6307 9. Added ${quote_local_part.
6308
630910. MIME decoding is now applied to the contents of Subject: header lines when
6310    they are logged.
6311
631211. Now that a reference to $sender_host_address automatically causes a reverse
6313    lookup to occur if necessary (4.13/18), there is no need to arrange for a
6314    host lookup before query-style lookups in lists that might use this
6315    variable. This has therefore been abolished, and the "net-" prefix is no
6316    longer necessary for query-style lookups.
6317
631812. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6319    have been a typo for LFLAGS, so it has been changed.
6320
632113. The install script calls Exim with "-C /dev/null" in order to find the
6322    version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6323    to be output. However, since Exim outputs its version number before the
6324    error, it didn't break the script. It just looked ugly. I fixed this by
6325    always allowing "-C /dev/null" if the caller is root.
6326
632714. Ignore overlarge ACL variable number when reading spool file - insurance
6328    against a later release with more variables having written the file.
6329
633015. The standard form for an IPv6 address literal was being rejected by EHLO.
6331    Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6332    this, as well as the form without the "IPv6" on the front.
6333
633416. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6335    OS/Makefile-Darwin file.
6336
633717. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6338    only to LDAP libraries that do not have LDAP_OPT_DEREF.
6339
634018. After change 4.21/52, "%ld" was used to format the contents of the $inode
6341    variable. However, some OS use ints for inodes. I've added cast to long int
6342    to get rid of the compiler warning.
6343
634419. I had forgotten to lock out "/../" in configuration file names when
6345    ALT_CONFIG_PREFIX was set.
6346
634720. Routers used for verification do not need to specify transports. However,
6348    if such a router generated a host list, and callout was configured, Exim
6349    crashed, because it could not find a port number from the (non-existent)
6350    transport. It now assumes port 25 in this circumstance.
6351
635221. Added the -t option to exigrep.
6353
635422. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6355    wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6356    NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6357    them is set, LOOKUP_LSEARCH is forced.
6358
635923. "exim -bV" now outputs a list of lookups that are included in the binary.
6360
636124. Added sender and host information to the "rejected by local_scan()" log
6362    line; previously there was no indication of these.
6363
636425. Added .include_if_exists.
6365
636626. Change 3.952/11 added an explicit directory sync on top of a file sync for
6367    Linux. It turns out that not all file systems support this. Apparently some
6368    versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6369    do it.) To cope with this, the error EINVAL, which means that sync-ing is
6370    not supported on the file descriptor, is now ignored when Exim is trying to
6371    sync a directory. This applies only to Linux.
6372
637327. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6374
637528. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6376    /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6377    this.
6378
637929. Added support for maildirsize files from supplied patch (modified a bit).
6380
638130. The use of :fail: followed by an empty string could lead Exim to respond to
6382    sender verification failures with (e.g.):
6383
6384      550 Verification failed for <xxx>
6385      550 Sender verify failed
6386
6387    where the first response line was missing the '-' that indicates it is not
6388    the final line of the response.
6389
639031. The loop for finding the name of the user that called Exim had a hardwired
6391    limit of 10; it now uses the value of finduser_retries, which is used for
6392    all other user lookups.
6393
639432. Added $received_count variable, available in data and not_smtp ACLs, and at
6395    delivery time.
6396
639733. Exim was neglecting to zero errno before one call of strtol() when
6398    expanding a string and expecting an integer value. On some systems this
6399    resulted in spurious "integer overflow" errors. Also, it was casting the
6400    result into an int without checking.
6401
640234. Testing for a connection timeout using "timeout_connect" in the retry rules
6403    did not work. The code looks as if it has *never* worked, though it appears
6404    to have been documented since at least release 1.62. I have made it work.
6405
640635. The "timeout_DNS" error in retry rules, also documented since at least
6407    1.62, also never worked. As it isn't clear exactly what this means, and
6408    clearly it isn't a major issue, I have abolished the feature by treating it
6409    as "timeout", and writing a warning to the main and panic logs.
6410
641136. The display of retry rules for -brt wasn't always showing the error code
6412    correctly.
6413
641437. Added new error conditions to retry rules: timeout_A, timeout_MX,
6415    timeout_connect_A, timeout_connect_MX.
6416
641738. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6418    to the empty sender.
6419
642039. The daemon was not analysing the content of -oX till after it had closed
6421    stderr and disconnected from the controlling terminal. This meant that any
6422    syntax errors were only noted on the panic log, and the return code from
6423    the command was 0. By re-arranging the code a little, I've made the
6424    decoding happen first, so such errors now appear on stderr, and the return
6425    code is 1. However, the actual setting up of the sockets still happens in
6426    the disconnected process, so errors there are still only recorded on the
6427    panic log.
6428
642940. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6430    connections (as happens on some IP stacks) was logged at start up time as
6431    just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6432    it from "IPv6 and IPv4", which means that two separate sockets are being
6433    used.
6434
643541. The debug output for gethostbyname2() or getipnodebyname() failures now
6436    says whether AF_INET or AF_INET6 was passed as an argument.
6437
643842. Exiwhat output was messed up when time zones were included in log
6439    timestamps.
6440
644143. Exiwhat now gives more information about the daemon's listening ports,
6442    and whether -tls-on-connect was used.
6443
644444. The "port" option of the smtp transport is now expanded.
6445
644645. A "message" modifier in a "warn" statement in a non-message ACL was being
6447    silently ignored. Now an error message is written to the main and panic
6448    logs.
6449
645046. There's a new ACL modifier called "logwrite" which writes to a log file
6451    as soon as it is encountered.
6452
645347. Added $local_user_uid and $local_user_gid at routing time.
6454
645548. Exim crashed when trying to verify a sender address that was being
6456    rewritten to "<>".
6457
645849. Exim was recognizing only a space character after ".include". It now also
6459    recognizes a tab character.
6460
646150. Fixed several bugs in the Perl script that creates the exim.8 man page by
6462    extracting the relevant information from the specification. The man page no
6463    longer contains scrambled data for the -d option, and I've added a section
6464    at the front about calling Exim under different names.
6465
646651. Added "extra_headers" argument to the "mail" command in filter files.
6467
646852. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6469    crash.
6470
647153. Installed eximstats 1.29.
6472
647354. Added transport_filter_timeout as a generic transport option.
6474
647555. Exim no longer adds an empty Bcc: header to messages that have no To: or
6476    Cc: header lines. This was required by RFC 822, but it not required by RFC
6477    2822.
6478
647956. Exim used to add From:, Date:, and Message-Id: header lines to any
6480    incoming messages that did not have them. Now it does so only if the
6481    message originates locally, that is, if there is no associated remote host
6482    address. When Resent- header lines are present, this applies to the Resent-
6483    lines rather than the non-Resent- lines.
6484
648557. Drop incoming SMTP connection after too many syntax or protocol errors. The
6486    limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6487
648858. Messages for configuration errors now include the name of the main
6489    configuration file - useful now that there may be more than one file in a
6490    list (.included file names were always shown).
6491
649259. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6493    for those rare installations that do not start the daemon as root or run it
6494    setuid root. I've cut out the call to initgroups() if the daemon is not
6495    root at that time.
6496
649760. The Exim user and group can now be bound into the binary as text strings
6498    that are looked up at the start of Exim's processing.
6499
650061. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6501
650262. Added $mailstore_basename variable.
6503
650463. Installed patch to sieve.c from Michael Haardt.
6505
650664. When Exim failed to open the panic log after failing to open the main log,
6507    the original message it was trying to log was written to stderr and debug
6508    output, but if they were not available (the usual case in production), it
6509    was lost. Now it is written to syslog before the two lines that record the
6510    failures to open the logs.
6511
651265. Users' Exim filters run in subprocesses under the user's uid. It is
6513    possible for a "deliver" command or an alias in a "personal" command to
6514    provoke an address rewrite. If logging of address rewriting is configured,
6515    this fails because the process is not running as root or exim. There may be
6516    a better way of dealing with this, but for the moment (because 4.30 needs
6517    to be released), I have disabled address rewrite logging when running a
6518    filter in a non-root, non-exim process.
6519
6520
6521Exim version 4.24
6522-----------------
6523
6524 1. The buildconfig auxiliary program wasn't quoting the value set for
6525    HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6526    not defined. This bug was masked in 4.22 by the effect that was fixed in
6527    change 4.23/1.
6528
6529 2. Some messages that were rejected after a message id was allocated were
6530    shown as "incomplete" by exigrep. It no longer does this for messages that
6531    are rejected by local_scan() or the DATA or non-SMTP ACLs.
6532
6533 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6534    have allow_domain_literals set, the ID did not get logged in the <= line.
6535    Domain literals are now always recognized in Message-ID: header lines.
6536
6537 4. The first argument for a ${extract expansion item is the key name or field
6538    number. Leading and trailing spaces in this item were not being ignored,
6539    causing some misleading effects.
6540
6541 5. When deliver_drop_privilege was set, single queue runner processes started
6542    manually (i.e. by the command "exim -q") or by the daemon (which uses the
6543    same command in the process it spins off) were not dropping privilege.
6544
6545 6. When the daemon running as "exim" started a queue runner, it always
6546    re-executed Exim in the spun-off process. This is a waste of effort when
6547    deliver_drop_privilege is set. The new process now just calls the
6548    queue-runner function directly.
6549
6550
6551Exim version 4.23
6552-----------------
6553
6554 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6555    HEADERS_CHARSET.
6556
6557 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6558    ignored. Though the use of -oP was forcing the writing of a pid file, it
6559    was always written to the default place.
6560
6561 3. If the message "no IP address found for host xxxx" is generated during
6562    incoming verification, it is now followed by identification of the incoming
6563    connection (so you can more easily find what provoked it).
6564
6565 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6566
6567 5. Added some features to "harden" Exim a bit more against certain attacks:
6568
6569    (a) There is now a build-time option called FIXED_NEVER_USERS that can
6570        be put in Local/Makefile. This is like the never_users runtime option,
6571        but it cannot be overridden. The default setting is "root".
6572
6573    (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6574        prefix string with which any file named in a -C command line option
6575        must start.
6576
6577    (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6578        is retained for -C and -D only if the caller of Exim is root. Without
6579        it, the exim user may also use -C and -D and retain privilege.
6580
6581    (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6582        command line option is disabled.
6583
6584 6. Macro names set by the -D option must start with an upper case letter, just
6585    like macro names defined in the configuration file.
6586
6587 7. Added "dereference=" facility to LDAP.
6588
6589 8. Two instances of the typo "uknown" in the source files are fixed.
6590
6591 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6592    the Configure-Makefile script screwed up while processing it.
6593
659410. Incorporated PCRE 4.4.
6595
659611. The SMTP synchronization check was not operating right at the start of an
6597    SMTP session. For example, it could not catch a HELO sent before the client
6598    waited for the greeting. There is now a check for outstanding input at the
6599    point when the greeting is written. Because of the duplex, asynchronous
6600    nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6601    way, but not yet received, when the check is performed.
6602
660312. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6604    on TCP/IP sockets, because this apparently causes some broken clients to
6605    timeout.
6606
660713. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6608    unchanged) from the Cygwin maintainer.
6609
661014. The code for -bV that shows what is in the binary showed "mbx" when maildir
6611    was supported instead of testing for mbx. Effectively a typo.
6612
661315. The spa authenticator server code was not checking that the input it
6614    received was valid base64.
6615
661616. The debug output line for the "set" modifier in ACLs was not showing the
6617    name of the variable that was being set.
6618
661917. Code tidy: the variable type "vtype_string" was never used. Removed it.
6620
662118. Previously, a reference to $sender_host_name did not cause a DNS reverse
6622    lookup on its own. Something else was needed to trigger the lookup. For
6623    example, a match in host_lookup or the need for a host name in a host list.
6624    Now, if $sender_host_name is referenced and the host name has not yet been
6625    looked up, a lookup is performed. If the lookup fails, the variable remains
6626    empty, and $host_lookup_failed is set to "1".
6627
662819. Added "eqi" as a case-independent comparison operator.
6629
663020. The saslauthd authentication condition could segfault if neither service
6631    nor realm was specified.
6632
663321. If an overflowing value such as "2048M" was set for message_size_limit, the
6634    error message that was logged was misleading, and incoming SMTP
6635    connections were dropped. The message is now more accurate, and temporary
6636    errors are given to SMTP connections.
6637
663822. In some error situations (such as 21 above) Exim rejects all SMTP commands
6639    (except RSET) with a 421 error, until QUIT is received. However, it was
6640    failing to send a response to QUIT.
6641
664223. The HELO ACL was being run before the code for helo_try_verify_hosts,
6643    which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6644    ACL is now run after the helo_try_verify_hosts code.
6645
664624. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6647    "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6648    case-independent, so other case variants are also recognized). Apparently
6649    some systems use these upper case variants.
6650
665125. If more than two messages were waiting for the same host, and a transport
6652    filter was specified for the transport, Exim sent two messages over the
6653    same TCP/IP connection, and then failed with "socket operation on non-
6654    socket" when it tried to send the third.
6655
665626. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6657
665827. The extern definition of crypt16() in expand.c was not being excluded when
6659    the OS had its own crypt16() function.
6660
666128. Added bounce_return_body as a new option, and bounce_return_size_limit
6662    as a preferred synonym for return_size_limit, both as an option and as an
6663    expansion variable.
6664
666529. Added LIBS=-liconv to OS/Makefile-OSF1.
6666
666730. Changed the default configuration ACL to relax the local part checking rule
6668    for addresses that are not in any local domains. For these addresses,
6669    slashes and pipe symbols are allowed within local parts, but the sequence
6670    /../ is explicitly forbidden.
6671
667231. SPA server authentication was not clearing the challenge buffer before
6673    using it.
6674
667532. log_message in a "warn" ACL statement was writing to the reject log as
6676    well as to the main log, which contradicts the documentation and doesn't
6677    seem right (because no rejection is happening). So I have stopped it.
6678
667933. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6680    However, I am unable to do any testing of this.
6681
668234. Fixed an infelicity in the appendfile transport. When checking directories
6683    for a mailbox, to see if any needed to be created, it was accidentally
6684    using path names with one or more superfluous leading slashes; tracing
6685    would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6686
668735. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6688    contents are added to the log line that is written for every discarded
6689    recipient. (Previously a log_message setting was ignored.)
6690
669136. The ${quote: operator now quotes the string if it is empty.
6692
669337. The install script runs exim in order to find its version number. If for
6694    some reason other than non-existence or emptiness, which it checks, it
6695    could not run './exim', it was installing it with an empty version number,
6696    i.e. as "exim-". This error state is now caught, and the installation is
6697    aborted.
6698
669938. An argument was missing from the function that creates an error message
6700    when Exim fails to connect to the socket for saslauthd authentication.
6701    This could cause Exim to crash, or give a corrupted message.
6702
670339. Added isip, isip4, and isip6 to ${if conditions.
6704
670540. The ACL variables $acl_xx are now saved with the message, and can be
6706    accessed later in routers, transports, and filters.
6707
670841. The new lookup type nwildlsearch is like wildlsearch, except that the key
6709    strings in the file are not string-expanded.
6710
671142. If a MAIL command specified a SIZE value that was too large to fit into an
6712    int variable, the check against message_size_limit failed. Such values are
6713    now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6714    day this will have to be increased, but I don't think I want to be around
6715    when emails are that large.
6716
6717
6718
6719Exim version 4.22
6720-----------------
6721
6722 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6723    iconv() is not standard in FreeBSD.
6724
6725 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6726    IPv6 enabled. The observed symptom was a segmentation fault on return from
6727    the function os_common_find_running_interfaces() in src/os.c.
6728
6729 3. In the check_special_case() function in daemon.c I had used "errno" as an
6730    argument name, which causes warnings on some systems. This was basically a
6731    typo, since it was named "eno" in the comments!
6732
6733 4. The code that waits for the clock to tick (at a resolution of some fraction
6734    of a second) so as to ensure message-id uniqueness was always waiting for
6735    at least one whole tick, when it could have waited for less. [This is
6736    almost certainly not relevant at current processor speeds, where it is
6737    unlikely to ever wait at all. But we try to future-proof.]
6738
6739 5. The function that sleeps for a time interval that includes fractions of a
6740    second contained a race. It did not block SIGALRM between setting the
6741    timer, and suspending (a couple of lines later). If the interval was short
6742    and the sigsuspend() was delayed until after it had expired, the suspension
6743    never ended. On busy systems this could lead to processes getting stuck for
6744    ever.
6745
6746 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6747    process, before it forks any delivery processes. The open lookup caching
6748    mechanism meant that the open file or database connection was passed into
6749    the delivery process. The problem was that delivery processes always tidy
6750    up cached lookup data. This could cause a problem for the next delivery
6751    process started by the queue runner, because the external queue runner
6752    process does not know about the closure. So the next delivery process
6753    still has data in the lookup cache. In the case of a file lookup, there was
6754    no problem because closing a file descriptor in a subprocess doesn't affect
6755    the parent. However, if the lookup was caching a connection to a database,
6756    the connection was closed, and the second delivery process was likely to
6757    see errors such as "PGSQL: query failed: server closed the connection
6758    unexpectedly". The problem has been fixed by closing all cached lookups
6759    in a queue runner before running a delivery process.
6760
6761 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6762    seem to have the "const" qualifier which it has on other OS. I've
6763    parameterised it.
6764
6765 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6766    *of the same type* (client or server) with the same public name that an
6767    error should be diagnosed.
6768
6769 9. When Exim looked up a host name for an IP address, but failed to find the
6770    original IP address when looking up the host name (a safety check), it
6771    output the message "<ip address> does not match any IP for NULL", which was
6772    confusing, to say the least. The bug was that the host name should have
6773    appeared instead of "NULL".
6774
677510. Since release 3.03, if Exim is called by a uid other than root or the Exim
6776    user that is built into the binary, and the -C or -D options is used, root
6777    privilege is dropped before the configuration file is read. In addition,
6778    logging is switched to stderr instead of the normal log files. If the
6779    configuration then re-defines the Exim user, the unprivileged environment
6780    is probably not what is expected, so Exim logs a panic warning message (but
6781    proceeds).
6782
6783    However, if deliver_drop_privilege is set, the unprivileged state may well
6784    be exactly what is intended, so the warning has been cut out in that case,
6785    and Exim is allowed to try to write to its normal log files.
6786
6787
6788Exim version 4.21
6789-----------------
6790
6791 1. smtp_return_error_details was not giving details for temporary sender
6792    or receiver verification errors.
6793
6794 2. Diagnose a configuration error if two authenticators have the same public
6795    name.
6796
6797 3. Exim used not to create the message log file for a message until the first
6798    delivery attempt. This could be confusing when incoming messages were held
6799    for policy or load reasons. The message log file is now created at the time
6800    the message is received, and an initial "Received" line is written to it.
6801
6802 4. The automatically generated man page for command line options had a minor
6803    bug that caused no ill effects; however, a more serious problem was that
6804    the procedure for building the man page automatically didn't always
6805    operate. Consequently, release 4.20 contains an out-of-date version. This
6806    shouldn't happen again.
6807
6808 5. When building Exim with embedded Perl support, the script that builds the
6809    Makefile was calling 'perl' to find its compile-time parameters, ignoring
6810    any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
6811
6812 6. The freeze_tell option was not being used for messages that were frozen on
6813    arrival, either by an ACL or by local_scan().
6814
6815 7. Added the smtp_incomplete_transaction log selector.
6816
6817 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
6818    was accepting AUTH without a new EHLO.
6819
6820 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
6821    ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
6822    RFC.
6823
682410. Logging of TCP/IP connections (when configured) now happens in the main
6825    daemon process instead of the child process, so that the TCP/IP connection
6826    count is more accurate (but it can never be perfect).
6827
682811. The use of "drop" in a nested ACL was not being handled correctly in the
6829    outer ACL. Now, if condition failure induced by the nested "drop" causes
6830    the outer ACL verb to deny access ("accept" or "discard" after "endpass",
6831    or "require"), the connection is dropped.
6832
683312. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
6834    that yield "discard" can now be used with an "accept" or a "discard" verb,
6835    but an error is generated for any others (because I can't see a useful way
6836    to define what should happen).
6837
683813. When an ACL is read dynamically from a file (or anywhere else), the lines
6839    are now processed in the same way as lines in the Exim configuration file.
6840    In particular, continuation lines are supported.
6841
684214. Added the "dnslists = a.b.c!=n.n.n.n" feature.
6843
684415. Added -ti meaning -t -i.
6845
684616. Check for letters, digits, hyphens, and dots in the names of dnslist
6847    domains, and warn by logging if others are found.
6848
684917. At least on BSD, alignment is not guaranteed for the array of ifreq's
6850    returned from GIFCONF when Exim is trying to find the list of interfaces on
6851    a host. The code in os.c has been modified to copy each ifreq to an aligned
6852    structure in all cases.
6853
6854    Also, in some cases, the returned ifreq's were being copied to a 'struct
6855    ifreq' on the stack, which was subsequently passed to host_ntoa(). That
6856    means the last couple of bytes of an IPv6 address could be chopped if the
6857    ifreq contained only a normal sockaddr (14 bytes storage).
6858
685918. Named domain lists were not supported in the hosts_treat_as_local option.
6860    An entry such as +xxxx was not recognized, and was treated as a literal
6861    domain name.
6862
686319. Ensure that header lines added by a DATA ACL are included in the reject log
6864    if the ACL subsequently rejects the message.
6865
686620. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
6867    MD5 (which is deprecated).
6868
686921. When testing a filter file using -bf, Exim was writing a message when it
6870    took the sender from a "From " line in the message, but it was not doing so
6871    when it took $return_path from a Return-Path: header line. It now does.
6872
687322. If the contents of a "message" modifier for a "warn" ACL verb do not begin
6874    with a valid header line field name (a series of printing characters
6875    terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
6876
687723. Changed "disc" in the source to "disk" to conform to the documentation and
6878    the book and for uniformity.
6879
688024. Ignore Sendmail's -Ooption=value command line item.
6881
688225. When execve() failed while trying to run a command in a pipe transport,
6883    Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
6884    could be confused with a return value of 69 from the command itself. This
6885    has been changed to 127, the value the shell returns if it is asked to run
6886    a non-existent command. The wording for the related log line suggests a
6887    non-existent command as the problem.
6888
688926. If received_header_text expands to an empty string, do not add a Received:
6890    header line to the message. (Well, it adds a token one on the spool, but
6891    marks it "old" so that it doesn't get used or transmitted.)
6892
689327. Installed eximstats 1.28 (addition of -nt option).
6894
689528. There was no check for failure on the call to getsockname() in the daemon
6896    code. This can fail if there is a shortage of resources on the system, with
6897    ENOMEM, for example. A temporary error is now given on failure.
6898
689929. Contrary to the C standard, it seems that in some environments, the
6900    equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
6901    program. Exim now does this explicitly; it affects the formatting of
6902    timestamps using strftime().
6903
690430. If exiqsumm was given junk data, it threw up some uninitialized variable
6905    complaints. I've now initialized all the variables, to avoid this.
6906
690732. Header lines added by a system filter were not being "seen" during
6908    transport-time rewrites.
6909
691033. The info_callback() function passed to OpenSSL is set up with type void
6911    (*)(SSL *, int, int), as described somewhere. However, when calling the
6912    function (actually a macro) that sets it up, the type void(*)() is
6913    expected. I've put in a cast to prevent warnings from picky compilers.
6914
691534. If a DNS black list lookup found a CNAME record, but there were no A
6916    records associated with the domain it pointed at, Exim crashed.
6917
691835. If a DNS black list lookup returned more than one A record, Exim ignored
6919    all but the first. It now scans all returned addresses if a particular IP
6920    value is being sought. In this situation, the contents of the
6921    $dnslist_value variable are a list of all the addresses, separated by a
6922    comma and a space.
6923
692436. Tightened up the rules for host name lookups using reverse DNS. Exim used
6925    to accept a host name and all its aliases if the forward lookup for any of
6926    them yielded the IP address of the incoming connection. Now it accepts only
6927    those names whose forward lookup yields the correct IP address. Any other
6928    names are discarded. This closes a loophole whereby a rogue DNS
6929    administrator could create reverse DNS records to break through a
6930    wildcarded host restriction in an ACL.
6931
693237. If a user filter or a system filter that ran in a subprocess used any of
6933    the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
6934    the wrong values were passed to the pipe command ($thisaddress had the
6935    value of $0, $0 had the value of $1, etc). This bug was introduced by
6936    change 4.11/101, and not discovered because I wrote an inadequate test. :-(
6937
693838. Improved the line breaking for long SMTP error messages from ACLs.
6939    Previously, if there was no break point between 40 and 75 characters, Exim
6940    left the rest of the message alone. Two changes have been made: (a) I've
6941    reduced the minimum length to 35 characters; (b) if it can't find a break
6942    point between 35 and 75 characters, it looks ahead and uses the first one
6943    that it finds. This may give the occasional overlong line, but at least the
6944    remaining text gets split now.
6945
694639. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
6947    file descriptors might be low, and that setting 1000 would always raise it.
6948    It turns out that in some environments, the limit is already over 1000 and
6949    that lowering it causes trouble. So now Exim takes care not to decrease it.
6950
695140. When delivering a message, the value of $return_path is set to $sender_
6952    address at the start of routing (routers may change the value). By an
6953    oversight, this default was not being set up when an address was tested by
6954    -bt or -bv, which affected the outcome if any router or filter referred to
6955    $return_path.
6956
695741. The idea of the "warn" ACL verb is that it adds a header or writes to the
6958    log only when "message" or "log_message" are set. However, if one of the
6959    conditions was an address verification, or a call to a nested ACL, the
6960    messages generated by the underlying test were being passed through. This
6961    no longer happens. The underlying message is available in $acl_verify_
6962    message for both "message" and "log_message" expansions, so it can be
6963    passed through if needed.
6964
696542. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
6966    new expansion $bh_ to give the encoded byte string without charset
6967    translation. Translation happens only if iconv() is available; HAVE_ICONV
6968    indicates this at build time. HEADERS_CHARSET gives the charset to
6969    translate to; headers_charset can change it in the configuration, and
6970    "headers charset" can change it in an individual filter file.
6971
697243. Now that we have a default RFC 2047 charset (see above), the code in Exim
6973    that creates RFC 2047 encoded "words" labels them as that charset instead
6974    of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
6975    expansion operator; (ii) when Exim creates a From: line for a local
6976    message; (iii) when a header line is rewritten to include a "phrase" part.
6977
697844. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
6979    buggy, causing it to skip the first lines of messages whose message ID
6980    ended in 'D'. This would not have bitten before Exim release 4.14, because
6981    message IDs were unlikely to end in 'D' before then. The effect was to have
6982    incorrect size information for certain domains.
6983
698445. #include "config.h" was missing at the start of the crypt16.c module. This
6985    caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
6986    noticed.
6987
698846. If there was a timeout during a "random" callout check, Exim treated it as
6989    a failure of the random address, and carried on sending RSET and the real
6990    address. If the delay was just some slowness somewhere, the response to the
6991    original RCPT would be taken as a response to RSET and so on, causing
6992    mayhem of various kinds.
6993
699447. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
6995    when I implemented it. It didn't allow for the fact that some option values
6996    may legitimately be negative (e.g. size_addition), and it didn't even do
6997    the right test for positive values.
6998
699948. Domain names in DNS records are case-independent. Exim always looks them up
7000    in lower case. Some resolvers return domain names in exactly the case they
7001    appear in the zone file, that is, they may contain uppercase letters. Not
7002    all resolvers do this - some return always lower case. Exim was treating a
7003    change of case by a resolver as a change of domain, similar to a widening
7004    of a domain abbreviation. This triggered its re-routing code and so it was
7005    trying to route what was effectively the same domain again. This normally
7006    caused routing to fail (because the router wouldn't handle the domain
7007    twice). Now Exim checks for this case specially, and just changes the
7008    casing of the domain that it ultimately uses when it transmits the message
7009    envelope.
7010
701149. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7012    module.
7013
701450. If a filter generated a file delivery with a non-absolute name (possible if
7015    no home directory exists for the router), the forbid_file option was not
7016    forbidding it.
7017
701851. Added '&' feature to dnslists, to provide bit mask matching in addition to
7019    the existing equality matching.
7020
702152. Exim was using ints instead of ino_t variables in some places where it was
7022    dealing with inode numbers.
7023
702453. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7025    TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7026    called TMPDIR, and if it finds it is different, it changes its value.
7027
702854. The smtp_printf() function is now made available to local_scan() so
7029    additional output lines can be written before returning. There is also an
7030    smtp_fflush() function to enable the detection of a dropped connection.
7031    The variables smtp_input and smtp_batched_input are exported to
7032    local_scan().
7033
703455. Changed the default runtime configuration: the message "Unknown user"
7035    has been removed from the ACL, and instead placed on the localuser router,
7036    using the cannot_route_message feature. This means that any verification
7037    failures that generate their own messages won't get overridden. Similarly,
7038    the "Unrouteable address" message that was in the ACL for unverifiable
7039    relay addresses has also been removed.
7040
704156. Added hosts_avoid_esmtp to the smtp transport.
7042
704357. The exicyclog script was not checking for the esoteric option
7044    CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7045    will work only if exicyclog is run under the appropriate euid.
7046
704758. Following a discussion on the list, the rules by which Exim recognises line
7048    endings on incoming messages have been changed. The -dropcr and drop_cr
7049    options are now no-ops, retained only for backwards compatibility. The
7050    following line terminators are recognized: LF CRLF CR. However, special
7051    processing applies to CR:
7052
7053    (i)  The sequence CR . CR does *not* terminate an incoming SMTP message,
7054         nor a local message in the state where . is a terminator.
7055
7056    (ii) If a bare CR is encountered in a header line, an extra space is added
7057         after the line terminator so as not to end the header. The reasoning
7058         behind this is that bare CRs in header lines are most likely either
7059         to be mistakes, or people trying to play silly games.
7060
706159. The size of a message, as listed by "-bp" or in the Exim monitor window,
7062    was being incorrectly given as 18 bytes larger than it should have been.
7063    This is a VOB (very old bug).
7064
706560. This may never have affected anything current, but just in case it has:
7066    When the local host is found other than at the start of a list of hosts,
7067    the local host, those with the same MX, and any that follow, are discarded.
7068    When the list in question was part of a longer list of hosts, the following
7069    hosts (not currently being processed) were also being discarded. This no
7070    longer happens. I'm not sure if this situation could ever has previously
7071    arisen.
7072
707361. Added the "/MX" feature to lists of hosts in the manualroute and query
7074    program routers.
7075
707662. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7077    header. This is something that is recommended in a new Internet Draft, and
7078    is something that is documented as being done by Sendmail. There are two
7079    possible values. For messages generated by the autoreply transport, Exim
7080    adds:
7081
7082      Auto-Submitted: auto-replied
7083
7084    whereas for all other generated messages (e.g. bounces) it adds
7085
7086      Auto-Submitted: auto-generated
7087
708863. The "personal" condition in filters now includes a test for the
7089    Auto-Submitted: header. If it contains the string "auto-" the message it
7090    not considered personal.
7091
709264. Added rcpt_include_affixes as a generic transport option.
7093
709465. Added queue_only_override (default true).
7095
709666. Added the syslog_duplication option.
7097
709867. If what should have been the first header line of a message consisted of
7099    a space followed by a colon, Exim was mis-interpreting it as a header line.
7100    It isn't of course - it is syntactically invalid and should therefore be
7101    treated as the start of the message body. The misbehaviour could have
7102    caused a number of strange effects, including loss of data in subsequent
7103    header lines, and spool format errors.
7104
710568. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7106    client host had authenticated. This control can now be exercised by an ACL
7107    for more flexibility.
7108
710969. By default, callouts do not happen when testing with -bh. There is now a
7110    variant, -bhc, which does actually run the callout code, including
7111    consulting and updating the callout cache.
7112
711370. Added support for saslauthd authentication, courtesy of Alexander
7114    Sabourenkov.
7115
711671. If statvfs() failed on the spool or log directories while checking their
7117    size for availability, Exim confusingly gave the error "space shortage".
7118    Furthermore, in debugging mode it crashed with a floating point exception.
7119    These checks are done if check_{spool,log}_{space,inodes} are set, and when
7120    an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7121    serious problem, Exim now writes to the main and panic logs when this
7122    happens, with details of the failure. It then refuses to accept the
7123    incoming message, giving the message "spool directory problem" or "log
7124    directory problem" with a 421 code for SMTP messages.
7125
712672. When Exim is about to re-exec itself, it ensures that the file descriptors
7127    0, 1, and 2 exist, because some OS complain for execs without them (see
7128    ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7129    descriptors. However, the code omitted to check that the open succeeded,
7130    causing mysterious errors if for some reason the permissions on /dev/null
7131    got screwed. Now Exim writes a message to the main and panic logs, and
7132    bombs out if it can't open /dev/null.
7133
713473. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7135    interact so that it is all more flexible. It is supposed to remain
7136    backwards compatible. Also added extra_local_interfaces.
7137
713874. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7139    to bomb out with an assertion failure - to the client this appears as a
7140    connection drop. This problem occurs in the part of the code that was taken
7141    from the Samba project. Fortunately, the assertion is in a very simple
7142    function, so I have fixed this by reproducing the function inline in the
7143    one place where it is called, and arranging for authentication to fail
7144    instead of killing the process with assert().
7145
714675. The SPA client code was not working when the server requested OEM rather
7147    than Unicode encoding.
7148
714976. Added code to make require_files with a specific uid setting more usable in
7150    the case where statting the file as root fails - usually a non-root-mounted
7151    NFS file system. When this happens and the failure is EACCES, Exim now
7152    forks a subprocess and does the per-uid checking as the relevant uid.
7153
715477. Added process_log_path.
7155
715678. If log_file_path was not explicitly set, a setting of check_log_space or
7157    check_log_inodes was ignored.
7158
715979. If a space check for the spool or log partitions fails, the incident is now
7160    logged. Of course, in the latter case the data may get lost...
7161
716280. Added the %p formatting code to string_format() so that it can be used to
7163    print addresses in debug_print(). Adjusted all the address printing in the
7164    debugging in store.c to use %p rather than %d.
7165
716681. There was a concern that a line of code in smtp_in.c could overflow a
7167    buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7168    initially expressed, the concern was not well-founded, because trailing
7169    spaces are removed early. However, if the trailing spaces were followed by
7170    a NULL, they did not get removed, so the overflow was possible. Two fixes
7171    were applied:
7172
7173    (a) I re-wrote the offending code in a cleaner fashion.
7174    (b) If an incoming SMTP command contains a NULL character, it is rejected
7175        as invalid.
7176
717782. When Exim changes uid/gid to the Exim user at daemon start time, it now
7178    runs initgroups(), so that if the Exim user is in any additional groups,
7179    they will be used during message reception.
7180
7181
7182Exim version 4.20
7183-----------------
7184
7185The change log for 4.20 and earlier releases has been archived.
7186
7187****