Make Postfix Listen to Multiple Ports
If you need postfix to listen on multiple ports (like I do) add lines like the following (replace numbers with whatever ports you desire):
1 2 3 | # In /etc/postfix/master.cf 25 inet n - - - - smtpd 26 inet n - - - - smtpd |
Make sure to open the ports in iptables as well.
