How do I install a spam filter?

Emails received at our mail servers are checked by Spamassassin. Suspected spam is tagged with an additional header which includes a spam score. CIMS users who receive emails locally on our servers can use this additional information to sort spam into separate folders. Our spam-tagged emails have an additional header that looks similar to this:

X-Spam-Score: 6.804 (******) DATE_MISSING,FROM_NO_LOWER,...

If you know how to setup filters on your mailer, you can ask your mailer to sort any mail with the X-Spam-Score: header into a separate folder. If your mailer does not have sorting capabilities, you can follow the instructions here to setup procmail to filter incoming emails for you.