Changing the SMTP port

The default SMTP port number is 25. Proper communication with the email hybrid service requires the use of port 25 for SMTP. However, the SMTP Port Option settings on the page Settings > Inbound/Outbound > Connection Control can be used to customize the port number.

Note: Changing this port setting causes module services to restart.

Steps

  1. Navigate to the page Settings > Inbound/Outbound > Connection Control.
  2. From the section SMTP Port Option, enter a valid port number in the text field SMTP port.
    Valid values are from 25 to 5000.
  3. Click OK.
    The settings are saved. The Email Security module services are restarted.