Setting Your Outgoing (SMTP) Server Settings
Click Mail, and select Preferences...
Open the Accounts tab
and select your existing account in the left panel.
Setting up your outbound SMTP server.
At the bottom of the right panel click the arrow to the right of Outgoing Mail Server (SMTP) and click “Edit
SMTP Server List …” from the
be presented with the screen below.
Click the Advanced tab
and verify Use default port (25, 465,
587) is selected.
UNCHECK the box next to Use Secure Sockets Layer (SSL).
Setting Your Incoming (POP) Server Settings
At the Accounts
screen click the Advanced tab.
Set the Port
field to 110 and make uncheck the box labeled Use SSL.
Make sure Authentication is set to Password
and the close button and confirm that you wish to save.