Alternate port for SMTP in cpanel

[66carolin]

I am using two different ISP and they use allow different ports for SMTP.
How to add third alternate port for SMTP in cpanel ?

[Joseph]

It is possible to add third alternate port but this is possible through WHM. You will find an option in WHM called "Exim Configuration Editor" through which you can add the third alternate port. However, please make sure that you contact the support dept if you are not sure about the changes to be done or if this may cause problems.