SMTP Authentication Problems using Apple Mail

Problem reported:

Users can't send using Mac Mail using SMTP authentication on port 25


  1. Launch Apple Mail.
  2. On the Mail Menu, click Preferences.
  3. Select Account tabs and select your email account.
  4. Click the "Server Settings" button under Outgoing Mail Server section.
  5. Enter the "Outgoing Mail Server" field:
  6. Change the port from default 25 to 587.

port:     587
authentication:  password
password:  your password
ssl:  don't check this box

You may have to quit Mail and restart it for everything to 'take' - do that and when it comes back up, go into preferences and verify that the settings are still set this way for

If you're trying to use SSL or a method other than password, you probably won't be able to log in - Mac Mail is one of the mail clients that gets confused if the SSL certificate is self-assigned, so SSL probably won't work.  Password authentication with no SSL does work, at least on 10.3 and 10.5.

Properties ID: 000029   Views: 6699   Updated: 7 years ago