The Apache SpamAssassin Project
The Powerful #1 Open-Source Spam Filter
Note
This is the home page for the open-source Apache SpamAssassin Project. There are also numerous prepackaged versions for Windows, commercial versions, and specialized front-ends.
If you were sent here because you received an e-mail message which was modified by SpamAssassin, please read this page.
Latest News
2011-06-16: SpamAssassin 3.3.2 has been released, a minor new release primarily to support perl-5.12 and later. Visit the downloads page to pick it up, and for more info.
(Older news items can be read at the News and Announcements page. Atom feed ![[image]](http://mowser.com/img?url=http%3A%2F%2Fspamassassin.apache.org%2Fimages%2Ffeed.png)
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Features
Wide-spectrum: SpamAssassin uses a wide variety of local and network tests to identify spam signatures. This makes it harder for spammers to identify one aspect which they can craft their messages to work around. Free software: it is distributed under the same terms and conditions as other popular open-source software packages such as the Apache web server. Easy to extend: Anti-spam tests and configuration are stored in plain text, making it easy to configure and add new rules. Flexible: SpamAssassin encapsulates its logic in a well-designed, abstract API so it can be integrated anywhere in the email stream. The Mail::SpamAssassin classes can be used on a wide variety of email systems including procmail, sendmail, Postfix, qmail, and many others. Easy Configuration: SpamAssassin requires very little configuration; you do not need to continually update it with details of your mail accounts, mailing list memberships, etc. Once classified, site and user-specific policies can then be applied against spam. Policies can be applied on both mail servers and later using the user's own mail user-agent application.
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