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The #1 Enterprise Open-Source Spam Filter


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2018-09-16: SpamAssassin 3.4.2 has been released! This release contains numerous tweaks and bug fixes over the past three and 1/2 years including:

2015-04-30: SpamAssassin 3.4.1 has been released! Highlights include: improved automation to help combat spammers that are abusing new top level domains; tweaks to the SPF support to block more spoofed emails; increased character set normalization to make rules easier to develop and stop spammers from using alternate character sets to bypass tests; continued refinement to the native IPv6 support; and improved Bayesian classification with better debugging and attachment hashing.

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.

2011-06-16: SpamAssassin 3.3.2 has been released, a minor new release primarily to support perl-5.12 and later. Visit the downloads page to pick it up, and for more info.

2010-03-19: SpamAssassin 3.3.1 has been released, a minor new release which adds some new rules. Visit the downloads page to pick it up, and for more info.

2010-01-27: SpamAssassin 3.3.0 has been released, a major new release! Visit the downloads page to pick it up, and for more info.

2010-01-01: Y2K10 Rule Bug - Update Your Rules Now!

Versions of the FH_DATE_PAST_20XX rule released with versions of Apache SpamAssassin 3.2.0 thru 3.2.5 will trigger on most mail with a Date header that includes the year 2010 or later.  The rule will add a score of up to 3.6 towards the spam classification of all email.  You should take corrective action immediately; there are two easy ways to correct the problem:

If you require help updating your rules to correct this issue you are encouraged to ask for assistance on the Apache SpamAssassin Users' list.  Users' mailing list info is here.

On behalf of the Apache SpamAssassin project I apologize for this error and the grief it may have caused you.

Regards,

Daryl C. W. O'Shea

VP, Apache SpamAssassin

 

2008-06-12: SpamAssassin 3.2.5 has been released, a minor bug-fix release. Visit the downloads page to pick it up, and for more info.

2008-01-05: SpamAssassin 3.2.4 has been released. Visit the downloads page to pick it up, and for more info.

2007-09-12: SpamAssassin has won an InfoWorld "Best Of Open Source Software" BOSSIE Award, as the winner in the anti-spam category for 2007!

2007-08-09: SpamAssassin 3.2.3 released! Visit the downloads page to pick it up, and for more info.

2007-07-25: SpamAssassin 3.2.2 released! Visit the downloads page to pick them up, and for more info.

2007-06-11: SpamAssassin 3.2.1 and 3.1.9 released! These releases contain a fix for a local user symlink-attack denial of service vulnerability for an uncommon spamd configuration, along with other fixes. Visit the downloads page to pick them up.

2007-05-02: SpamAssassin 3.2.0 released! This release contains a significant number of changes and major enhancements -- please use it! Visit the downloads page to pick it up. (The release announcement)

2007-02-14: SpamAssassin 3.1.8 released! This release fixes security bug CVE-2007-0451, so is recommended. Visit the downloads page to get the latest version.

2006-11-21: SpamAssassin wins 'Best Linux-based Anti-spam Solution' at the Linux New Media Awards 2006, winning 69% of the vote.

2006-10-10: SpamAssassin 3.1.7 released!
(The release announcement)

2006-10-05: SpamAssassin 3.1.6 released!
Visit the downloads page to get the latest version. (The release announcement)

2006-08-30: SpamAssassin 3.1.5 released!
Visit the downloads page to get the latest version. (The release announcement)

2006-07-26: SpamAssassin 3.1.4 released!
Visit the downloads page to get the latest version. (The release announcement)

2006-06-06: SpamAssassin 3.1.3 released! This is an important security release to fix CVE 2006-2447; read the advisory to see if you need to upgrade.
(The release announcement)

2006-06-05: SpamAssassin 3.0.6 released! This is an important security release to fix CVE 2006-2447; read the advisory to see if you need to upgrade.
Visit the downloads page to get the latest version. (The release announcement)

2006-05-25: SpamAssassin 3.1.2 released!
(The release announcement)

2006-03-11: SpamAssassin 3.1.1 released!
(The release announcement)

2006-02-21: Receiving three times as many votes as the closest contender, SpamAssassin took top honors in the Anti-Spam category of Datamation's Product of the Year 2006.

2005-09-14: SpamAssassin 3.1.0 released!
(The release announcement)

2005-02-09: Receiving twice as many votes as the closest contender, SpamAssassin took top honors in the Anti-Spam category of Datamation's Product of the Year 2005.

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