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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