Generic Settings

User name: the part of your email address before the @ sign...
Password: you should know this

Incoming server:
Incoming server type: IMAP
Incoming server port: 993
Use SSL? Yes
Authentication: Password

Outgoing server:
Outgoing server type: SMTP
Outgoing server port: 587
Use SSL? Yes
Authentication: Password

To change your password, log into via SSH. If you've completely forgotten your password or need additional help, e-mail me (if you still can) or contact me another way.

If you get an error saying that the certificate's not trusted, that's expected. The mail server is using a self-signed certificate rather than one that is issued by a third party.