Linux E-mail

Introduction to SpamAssassin

Spam filtering actually involves two phases—detecting the spam and then doing something with it. SpamAssassin is a spam detector and it modifies the e-mail it processes by putting in headers to mark whether it is spam. It is up to the MTA or the mail delivery agent in the e-mail system to react to the headers that SpamAssassin creates in an e-mail, to filter it out. However, it's possible that another part of the e-mail system could perform this task.

The previous figure gives a schematic representation of SpamAssassin. At the heart of SpamAssassin is its Rules Engine that determines which rules are called. Rules trigger ...