open mail, go to the preferences and click on "add account". name it something creative like... spymac. you will then get a sheet that asks for information on the account. you should configure it like this:
Account type: POP
Description: *Whatever you want to call it*
email address: yournamehere@spymac.com
full name: *insert any name you want*
incoming mail server: mail.spymac.com
username: *your username* (without the @spymac.com)
password: *your password*
go to the outgoing mail server pop-up menu and click "add server". spymac's smtp server is "smtp.spymac.com"
you're done. set whatever other options you want for the account and it will now show up in mail (and you don't have to bother with logging into the webpage every day).