The Mail Menu area allows you to manage all aspects of your email, from adding new accounts, managing mailing lists, and setting spam filters. There are quite a number of options available, so take your time.
Note: All email options can be used in conjunction with each other. For example, you could set up an auto-responder on your main account to email an "Out of Office" message, a forwarder to send the email to your uncle's house where you are staying, and a spam filter to reject all email with "credit" in the subject line. This flexibility is what makes email so powerful as a communication medium.
Reading your email
Setting your default email address
Mail Exchanger (MX Entry)