How To Configure PostFix To Listen On Multiple Ports
erics, Posted November 27th, 2010 at 1:10:13pm
Modify /etc/postfix/master.cf, and add one line per port. The example below shows the original smtp line along with a sample new line.
25 inet n - - - - smtpd
2525 inet n - - - - smtpd
Make sure to open the port in your firewall…
Another interesting solution I found was to use outbound TCP 587 which may be allowed by the ISP in question.
iptables -t nat -A PREROUTING -p tcp --dport 587 -j REDIRECT --to-ports 25
Categories: How-To's, Technology Email, master.cf, Multiple Ports, Port, PostFix, SMTP
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