SpamSieve 1.2 is now available.

Like your professional e-mail client, but jealous of Mail.app’s spam
filter? SpamSieve brings powerful Bayesian spam filtering to other
popular e-mail clients. It learns what your spam looks like, so it can
block nearly all of it. It also learns what your good messages look
like, so it won’t confuse them with spam. Other spam filters get worse
over time as spammers adapt to their rules; SpamSieve actually gets
better over time as you train it with more messages. SpamSieve doesn’t
delete any messages–it only marks them in your e-mail client–so you’ll
never lose any mail. SpamSieve works with any number of mail accounts,
of whatever types are supported by your e-mail software (e.g. POP,
IMAP, Hotmail).

Requirements: Mac OS X 10.1 or later
Supports: Emailer, Eudora 5.2, Entourage, Mailsmith, PowerMail
Price: $20 (shareware); free upgrade from 1.0 and 1.1
Download: (http://www.c-command.com/downloads/SpamSieve-1.2.dmg)
More Info: (http://www.c-command.com/spamsieve/)
Contact: Michael Tsai (spamsieve@c-command.com)

New in Version 1.2:

* Added support for Emailer and Eudora (5.2 and later).

* Decodes base64 and quoted-printable text parts, thus finding words
that spammers try to hide from anti-spam software.

* Keeps track of the messages added to the corpus, and can optionally
prevent you from adding the same message more than once (biasing the
counts). Thus, you no longer have to remember which messages you’ve
already added.

* You can now “undo” adds to the corpus, e.g. if you added a message
as good when you meant to add it as spam.

* Can now add messages to the corpus as they are filtered, so after
the initial training you only have to add messages when SpamSieve
makes a mistake.

* When filtering a message, SpamSieve can optionally check whether
the message is in the corpus. If it is, SpamSieve looks up the
answer rather than trying to predict.

* Keeps a log of additions to the corpus, filtering results, and
errors.

* When you add spam messages to the corpus, can optionally move them
to a Spam folder.

* Added status indicators in the Dock icon (like Norton DiskLight).

* Improved the manual’s instructions for e-mail client integration.

* Complete change list available at (http://www.c-command.com/spamsieve).