How can I configure alternate SMTP port on a cPanel server? Print

Login to the Web Host Manager => Service Configuration => Service Manager, you'll find an area there called "Exim Mail Server (on another port)".

From here you can specify the additional port for SMTP.  For example, you could use port 587 here. Tick both boxes there and save




NOTE: Make sure to add the exception for the additional port in the firewall settings. If you are using Config Server Security Firewall then you would add the custom port to the TCP IN and TCP OUT settings in the Firewall configuration.