What is SpamAssassin and how does it work?
SpamAssassin is a computer program used for e-mail spam filtering based on content-matching rules. A large set of rules are applied to determine whether an email is spam or not. To decide, specific fields within the email header and the email body are typically searched for certain regular spam expressions, and if these expressions match, the email is assigned a certain score. The message is then routed to the mailbox[es] of the intended UGAMail user. If the UGAMail recipient has his/her Junk Mail control turned on (see Anti-SPAM Quickstart for details), messages with a total score greater than 50 are routed to the Junk Mail folder.