What is SpamAssassin?

Wiki MarkupSpam{{`Assassin is a mail filter to identify spam. It is an intelligent email filter which uses a diverse range of tests to identify unsolicited bulk email, more commonly known as \["Spam"\]. These tests are applied to email headers and content to classify email using advanced statistical methods. In addition, Spam}}`Assassin has a modular architecture that allows other technologies to be quickly wielded against spam and is designed for easy integration into virtually any email system.

Want to learn more?

• Questions about using SpamAssassin can be asked on the SpamAssassin-Users MailingLists. However, please note AskingAboutIntegrations.
• BooksAboutSpamAssassin: Published books that discuss SpamAssassin.

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• Header tests
• Body phrase tests. For more information, see SpamAssassinRules.
• Bayesian filtering (BayesFaq)
• Automatic address whitelist/blacklist (AutoWhitelist)
• Manual address whitelist/blacklist (ManualWhitelist)
• Collaborative spam identification databases (DCC, Pyzor, Razor2); See NetworkTests.
• DNS Blocklists, also known as "RBLs" or "Realtime Blackhole Lists". See DnsBlocklists
• Character sets and locales

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Even though any one of these tests might, by themselves, mis-identify a \["Ham"\] or \["Spam"\], their combined score is terribly difficult to fool.

About the Apache Software Foundation

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