We just migrated from Site Manager to cPanel hosting. We use a remote mail exchanger. Our DNS and MX records are controlled at Network Solutions. The MX records have not changed.
In our Site Manager system, we had set "Listen on an Alternate Port" for SMTP services to successfully send mail from our shopping cart on the server and use our external smtp server.
With the same smtp configuration (server, port, email and password), we can no longer send mail on our cPanel site. I suspect that we have to change the cPanel server to 'listen on an Alternate Port", but I cannot find how to do that on the cPanel system.
Please point me in the right direction.