Frequently Asked Question

OS X Mail: Enabling SMTP Auth (required to send mail)
Last Updated 8 years ago

Enabling (SMTP Authentication)

  1. Open
  2. Go to Mail > Preferences
  3. Click Accounts > Account Information
  4. Under Account Information look for Outgoing Mail Server (SMTP).
  5. Click on the drop down arrow and select Edit Server List...
  6. Select the existing SMTP server for your domain -
  7. Click Advanced and change the server port to "Use Custom Port" and enter 587 or 2525.
  8. From the Authentication drop down, select Password
  9. Fill in your Username (e.g. and Password
  10. Click the Test Account Settings button to set the new settings.
  11. Click OK and then close the preferences window.
  12. Click Next then Finish.
  13. Save the changes, and try resending mail

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