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SpamAssassin is a mail filter which attempts to identify spam using a variety of mechanisms including text analysis, Bayesian filtering, DNS blocklists, and collaborative filtering databases.

Using its rule base, it uses a wide range of heuristic tests on mail headers and body text to identify "spam", also known as unsolicited commercial email.

Once identified, the mail can then be optionally tagged as spam for later filtering using the user's own mail user-agent application.

SpamAssassin typically differentiates successfully between spam and non-spam in between 95% and 100% of cases, depending on what kind of more...

What's New

Version 3.3.2:
  • Bug #6427: Spamc windows header library missing two defines.
  • Bug #6476: patch to fix missing sa-awl man page bug
  • Bug #6470: Small change in windows to exit stating that the exit statusis unknown. Thanks to Daniel Lemke for many of these small win32 patches.
  • Bug #6314: Complete removal of spamassassin.spec
  • Bug #6589: more...


  • Mac OS X 10.2 or later
  • Perl

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Current Version (3.x)


Downloads 15,155
Version Downloads 1,548
Type Internet / Servers
License Free
Date 16 Jun 2011
Platform OS X / PPC 32 / Intel 32
Price Free
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