QyE0PdHh

1import sys
2import subprocess
3import re
4
5_map = {
6    '.gmail.com.': 'Gmail',
7    '.aspmx.l.google.com.': 'G Suite',
8    '.mail.protection.outlook.com.': 'Office 365',
9    '.mail.eo.outlook.com.': 'Office 365',
10    '.emailsrvr.com.': 'RSE/HEX',
11    '.secureserver.net.': 'GoDaddy',
12}
13
14if __name__ == '__main__':
15    for l in sys.stdin:
16        e = l.strip ().lower ()
17        d = e.split ('@').pop ()
18
19        o = subprocess.check_output ('dig +short mx %s' % (d), shell = True)
20        if o == '':
21            print ('N/A')
22        else:
23            o = ';'.join (o.split ('\n')).lower ()
24            p = None
25            if d in o:
26                p = 'Self-Hosted/CNAME'
27            else:
28                for x in _map.keys ():
29                    if re.search (x, o):
30                        p = _map.get (x)
31                        break
32
33            print (p or 'Other')