Welcome

Welcome to the home page for the open-source Apache SpamAssassin Project.

• Click here to get started using SpamAssassin!
• Looking for tips to improve your existing installation? Click here for a variety of topics in our Wiki that might help.
• Sent here because you received an e-mail message which was modified by SpamAssassin? Please read this end-user notice.

Latest News

2014-02-11: SpamAssassin 3.4.0 has been released adding native support for IPv6, improved DNS Blocklist technology and support for massively-scalable Bayesian filtering using the Redis backend. Visit the downloads page to pick it up, and for more info.

News Archive page. Atom feed

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.