Disabling Port 25

Posted on | December 30, 2010 | No Comments

As part of our efforts to minimize mail deferrals, we will be deploying a popular and simple technique to combat outbound SPAM i.e disabling Port 25 for MUAs (such as outlook, thunderbird etc). Port 25 will be disabled in the third week of January and we will send you the final date soon.

Port 587 has already been enabled as a replacement.

To change the SMTP Port you need to enable Port 587 in the following way:

  • Outlook: Tools >> Account Settings >> Email >> Change >> More Settings >> Advanced >> Outgoing server (SMTP)
  • Thunderbird: Tools >> Account Settings >> Outgoing server (SMTP) >> Edit >> Port

Coupled with SPF and DKIM that we launched earlier, disabling Port 25 will help ensure a more stable and seamless email experience.

Note: This change is not for Google Apps Customers


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