Apache SpamAssassin
spamassassin.apache.orgThe #1 Open Source anti-spam platform for classifying and blocking email spam
Securityanti-spamemail-filteringopen-sourcebayesian-filteringperlsysadminemail-security

About
Apache SpamAssassin is an open-source anti-spam platform designed for system administrators to filter and block unsolicited bulk email. It employs a robust scoring framework combining heuristic analysis, Bayesian filtering, DNS blocklists, and collaborative filtering databases to evaluate email headers and body text. It is a project of the Apache Software Foundation and is widely used in server-side email filtering deployments.
Problem
Unwanted bulk email (spam) clogs inboxes and poses security risks for organizations relying on email infrastructure.
For
System administrators managing email servers
How it works
SpamAssassin scores incoming emails using a combination of text analysis, Bayesian filtering, DNS blocklists, and plug-in rules to classify and block spam.
Business model
open-source
Status
launched
Company
Apache Software Foundation