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VPS & Dedicated Hosting: Modify Exim Ports

Many ISPs (Internet Service Providers) block port 25. So, it is useful to have an alternate port that is available to use. Port 26 is open on all of Bluehost's shared servers so you may already have it configured by default. Otherwise, to open an additional port or if you want to change the port: 

  1. Log in to WHM.
  2. Click on Service Configuration
    WHM Service Configuration
  3. Click on Service Manager.
    WHM Service Manager
  4. Under exim, enable the SMTP Server.
    WHM Enable Exim
  5. Under exim on another port, make sure the port is set to 26.
    WHM Enable Port
  6. Click Save.