Configure exim to listen on additional ports

Exim is a popular Message Transfer Agent (MTA) used on Unix systems. By default Exim will be listening on port 25. To make Exim listening on other additional port, say 26, add the following line to /etc/exim.conf.

daemon_smtp_ports = 25 : 26

After this restart Exim using the following commands.

service exim restart
or
/etc/init.d/exim restart

This will make Exim to listen on ports 25 as well as 26. Make sure you open the port 26 in the server firewall.

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