On most UNIX systems, you can create a file called .forward in your home directory, which will direct all e-mail to a new address. However, the CS network has something a bit different. Each home directory has a subdirectory called /FWD which is really a link to another server. This server only deals with e-mail, protecting it from some of the problems that other production servers (such as the one that holds all your other files) might encounter. In other words, it should be able to take care of your e-mail even if some of the other servers are offline.
echo yourname@youraddress.com > ~/FWD/.forwardThis will take yourname@youraddress.com (or whatever e-mail address you want to receive your mail) and put it in a file called .forward, which is in the /FWD subdirectory of your home directory (~).
rm ~/FWD/.forwardThis will delete the .forward file and allow mail to stay in your CS e-mailbox.