July 2004
Intermediate to advanced
224 pages
6h 13m
English
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Chapter 1. Introducing SpamAssassin
The SpamAssassin system is software for analyzing email messages, determining how likely they are to be spam, and reporting its conclusions. It is a rule-based system that compares different parts of email messages with a large set of rules. Each rule adds or removes points from a message’s spam score. A message with a high enough score is reported to be spam.
Tip
SpamAssassin was a trademark of Deersoft, and Deersoft has been acquired by Network Associates. In this book, I won’t write SpamAssassin™ each time I mention it because that would be distracting, but you should assume that the trademark symbol is there.
Many spam-checking systems are available. SpamAssassin has become popular for several reasons:
It uses a large number of different kinds of rules and weights them according to their diagnosticity. Rules that have been demonstrated to be more effective at discriminating spam from non-spam email are given higher weightings.
It is easy to tune the scores associated with each rule or to add new rules based on regular expressions.
SpamAssassin can adapt to each system’s email environment, learning to recognize which senders are to be trusted and to identify new kinds of spam.
It can report spam to several different spam clearinghouses and can be configured to create spam traps—email addresses that are used only to forward spam to a clearinghouse.
It is free software, distributed under either the GNU Public License or the Artistic License. ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.