SpamAssassin and MTA Integration

Before we get to the actual installation of SpamAssassin, it is useful to cover how to integrate it into your environment. Each MTA has its own way of adding in third-party components like SpamAssassin. In addition, each MTA itself can have several methods of integrating SpamAssassin into it.

SpamAssassin is often integrated into a large email infrastructure via an MTA filter such as milter, MIMEdefang, and Qmail-Scanner. These programs enable a number of actions on messages, including anti-virus, filtering, and, of course, anti-spam. The other way to integrate SpamAssassin into your email system is to use a facility such as Procmail, which can be enabled on a per-user basis. Using Procmail might be good for ...

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