Help Article Mail OS X El Capitan troubleshooting

Is this the first time you’re setting up this email account? Then use our new email setup guide, rather than this troubleshooting guide.

Change to your domain name

Check account settings

  1. Launch Mail
  2. Choose Mail > Preferences


Account Information

3. Choose the relevant account from the list on the left, and ensure that the Account Information is correct, specifically:

  • Account Type can be IMAP or POP
  • Incoming Mail Server is mail.domain (or the specific server name or IP address of the domain)
  • User Name is the full email address
  • Password is correct – forgotten passwords can be reset in konsoleH
  • TLS Certificate is set to None

account info

SMTP Server settings

4. At Outgoing Mail Server (SMTP) click on the dropdown arrow and choose Edit SMTP Server list

On the Account Information tab ensure that:

  • Server Name is smtp.domain (or the specific server name or IP address of the domain)
  • TLS Certificate is None


5. Click on the Advanced tab, choose the relevant account and ensure that:

  • Automatically detect and maintain account settings is not ticked
  • Port is 587
  • Use SSL is not ticked
  • Allow insecure authentication is ticked
  • User Name is the full email address
  • > OK


Incoming Mail server settings

6. Back on the Accounts screen, click on the Advanced tab and ensure that the Incoming Server settings are correct, specifically:

  • Automatically detect and maintain account settings is not ticked
  • Port is 143 for IMAP (or 110 for POP)
  • Use SSL is not ticked
  • Authentication is set to Password
  • Allow insecure authentication is ticked

mac-accounts advanced


7. Close and Save settings when prompted.

Your El Capitan mail is now setup correctly.

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