Adding additional smtp port in Cpanel server

By default smtp servers use port 25 but some of the isps block port 25 and force their users to use their smtp server to avoid spamming, however Cpanel have a simple option to add additional smtp port so that your users can use their website’s smtp server to send emails.

  1. Login into WHM.
  2. Click on service manager.
  3. Enter the Alternative SMTP Port in the box and apply changes.

Using Service Manager in Cpanel

exim configuration for smtp

If you are running firewall in your server then you will have to open that additional port in your firewall.

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About shk

shk is a DevOps engineer with more than 12 years of experience in different organizations. He enthusiastic about learning new technologies and shares his knowledge through his blogs.


  1. thanks for sharing.

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