Apache SpamAssassin
Open-source spam filter for system administrators.
Apache SpamAssassin is an open-source anti-spam filter for system administrators that classifies incoming email and blocks unsolicited bulk messages. It applies a scoring framework to email headers and body text, combining heuristic and statistical tests to identify spam signatures. The project is maintained under the Apache Software Foundation.
Its capabilities include text analysis, Bayesian filtering, DNS blocklists, and collaborative filtering databases, with anti-spam tests and configuration stored in plain text for easy extension. The Mail::SpamAssassin API allows integration into the email stream across systems such as procmail, sendmail, Postfix, and qmail. Site and user-specific policies can be applied on mail servers or in a user's mail user-agent. The software is distributed as free software under open-source terms, with no paid editions, trials, or seat-based licensing described.
12 alternatives to Apache SpamAssassin
Ranked by how well each tool replaces Apache SpamAssassin: shared features, audience, price and popularity.
- 65 out of 100 match$100/mo
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SmarterMail Exchange alternative, help desk and web analytics
Covers 2 of 6 key features.
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Bogofilter is a mail filter that classifies mail as spam or ham (non-spam) by a Bayesian (
Covers 2 of 6 key features.
Free planOpen source56 out of 100 matchFreeLinux development house specializing in email server technology and anti-spam solutions
Covers 0 of 6 key features.
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Covers 0 of 6 key features.
55 out of 100 matchContact sales- 54 out of 100 match$10/mo
- 54 out of 100 matchContact sales
AI email marketing platform for creating campaigns, automating journeys and adding interac
Covers 4 of 6 key features.
Free plan54 out of 100 match$149/mo- 53 out of 100 match—