· 7 years ago · Apr 30, 2019, 08:04 AM
1/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
2
3brew install telnet
4
5host -t mx gmail.com
6
7telnet gmail-smtp-in.l.google.com 25
8
9telnet alt1.gmail-smtp-in.l.google.com 25