Here’s a brief video that will demonstrate how to set up Apple Mail.  This video was recorded from a MacBook using the latest OSX and Apple Mail versions.  If you have older software, this may not exactly represent what you’ll see, but it’ll be very similar.

If you’re using a email address, these are the settings you’ll use:

Incoming Mail Server:
Port 993 for IMAP
Port 995 for POP3

Outgoing Mail Server:
Port 587 or 465