[Mimedefang] [Fwd: [SA-Announce] SpamAssassin 2.50 released!]

[Whatley, Lee (CBA)]

FYI

-------- Original Message --------
Subject: [SA-Announce] SpamAssassin 2.50 released!
Date: Thu, 20 Feb 2003 14:15:09 +0000
From: jm at jmason.org (Justin Mason)
To: SpamAssassin-talk at lists.sourceforge.net
CC: SpamAssassin-devel at lists.sourceforge.net, 
SpamAssassin-announce at lists.sourceforge.net

OK folks -- SpamAssassin 2.50 is now up on /released/ .  Please download
and install!

	http://SpamAssassin.org/downloads.html

This should be considered a beta release.

Main changes since 2.4x:

- Bayesian filtering, using a Bayesian-style form of probability-analysis
   classification.  This uses an algorithm based on the one detailed in
   Paul Graham's 'A Plan For Spam' paper, along with aspects taken from
   Graham Robinson's work, and the chi-combining technique developed by the
   SpamBayes project.

- Auto-learning.  This trains the Bayesian filter automatically, based on
   the results from traditional SpamAssassin diagnosis.   It uses a set of
   heuristics and separate thresholds to ensure (as much as is possible)
   that it trains on guaranteed non-spam and spam.   Old, unused tokens are
   automatically expired.

- much-improved rule set.  A whole new set of rules based on Message-Id
   analysis is now in place, which accurately detects forged headers from
   a wide range of spamware.   Many inaccurate rules have been dropped.
   HTML tests much improved, with a set to detect image-only spam.

- new default format for detected-spam messages; the message is
   encapsulated as a MIME part, with a preview and the spam report
   in the main part of the message.

- Score sets.  Based on whether you are using just SpamAssassin rules,
   adding network tests, and using a trained Bayesian database,
   SpamAssassin will use a set of scores appropriately to gain the
   maximum degree of accuracy.

- Italian, Polish, Spanish, French and German rule sets and translations.

- Much improved reliability with spamd.  The problems with signals
   have been cleared up thanks to a pipe-based child tracking system,
   and all spamd-hanging bugs reported have proved unreproducable.

- Unicode problems with Red Hat 8 and perl 5.8 fixed.   Works on Perl
   5.005, 5.6.x, and 5.8.x.

- Taint-safe.  SpamAssassin runs with perl's taint-checking enabled for
   better security.

- Razor 1 support is now officially deprecated.

- "spamc -c" was not working, fixed.  This fix required increasing the
   revision of the spamd protocol; only difference is that now more than
   one protocol header can appear in the reply from spamd.

- all fixes from 2.44 included.

--j.


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