When you register for the course, your ACS UNIX email address will automatically be added to this list.
See the ACS home page for information on claiming your userid, how to change your password, and how to read your email from the computer here on campus.
If you have a different email address, then you should modify your SFU account to forward all email from your SFU account to your usual email address.
You may also want to use WEBMAIL to read your SFU mail over the web.