Edit your existing Apple Mail (POP) settings

1. Go to the Mail menu, then Preferences
   
   
   

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2. Match your settings to the ones displayed below:
   Incoming Mail Server: mail.efn.org
   User Name: Your FULL email address
   Click on the Server Settings... button
   
   
   

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3. Match your settings to the ones displayed below:
   Outgoing Mail Server: mail.efn.org
   Server port: 587
   Check Use Secure Sockets Layer (SSL)
   Authentication: Password
   User Name: Your Full email address
   Click the OK button
   
   
   

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4. Click the Advanced tab. Match your settings to the ones outlined in green below:
   Port: 995
   Check Use SSL
   Authentication: Password
   
   
   

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5. Close the window and Save your changes. You're done!