*** THIS IS A RELEASE CANDIDATE ONLY, NOT THE FINAL 3.0.0 RELEASE ***
SpamAssassin 3.0.0-rc4 is released! SpamAssassin 3.0.0 is a major update a=
includes a number of new email and anti-spam technologies.
SpamAssassin is a mail filter which uses advanced statistical and
heuristic tests to identify spam (also known as unsolicited bulk email).
Highlights of the release
- SpamAssassin is now part of the Apache Software Foundation and has an=20
improved software license, the 2.0 version of the Apache License.
- SpamAssassin now includes support for SPF (the Sender Policy Framework,
- Web site links contained in the message are checked against SURBL and
SBL. SURBL and SBL track sites that advertise with spam, known spam
sources, and spam services.
- The new 3.0 architecture allows third-parties to easily add plugin modul=
- There is now SQL database support for both the Bayes and auto-whitelist
modules, allowing more large sites to easily deploy SpamAssassin.
- A more accurate simulation of email client handling of MIME and HTML
improves our accuracy. In addition, there is better detection and
handling of spammer techniques that try to trick anti-spam software.
Pick it up from:
The release files also have a .asc accompanying them. The file serves
as an external GPG signature for the given release file. The signing
key is available via the wwwkeys.pgp.net key server, as well as
The key information is:
pub 1024D/265FA05B 2003-06-09 SpamAssassin Signing Key
Key fingerprint =3D3D 26C9 00A4 6DD4 0CD5 AD24 F6D7 DEE0 1987 265F A0=
Important installation notes
- The SpamAssassin 2.6x release series was the last set of releases to
officially support perl versions earlier than perl 5.6.1. If you are
using an earlier version of perl, you will need to upgrade before you
can use the 3.0.0 version of SpamAssassin.
- SpamAssassin 3.0.0 has a significantly different API (Application
Program Interface) from the 2.x series of code. This means that if you
use SpamAssassin through a third-party utility (milter, etc,) you need
to make sure you have an updated version which supports 3.0.0.
- The --auto-whitelist and -a options for "spamd" and "spamassassin" to
turn on the auto-whitelist have been removed and replaced by the
"use_auto_whitelist" configuration option which is also now turned on by
- The "rewrite_subject" and "subject_tag" configuration options were
deprecated and are now removed. Instead, using "rewrite_header Subject
[your desired setting]". e.g.
rewrite_header Subject ****SPAM(_SCORE_)****
- The Bayesian storage modules have been completely re-written and now
include Berkeley DB (DBM) storage as well as SQL based storage (see
sql/README.bayes for more information). In addition, a new format has
been introduced for the bayes database that stores tokens in fixed
length hashes. All DBM databases should be automatically converted to
this new format the first time they are opened for write. You can
manually perform the upgrade by running "sa-learn --sync" from the
The "sa-learn --rebuild" command has been deprecated; please use
"sa-learn --sync" instead. The --rebuild option will remain temporarily
for backwards compatibility.
- "spamd" now has a default max-children setting of 5; no more than 5
child scanner processes will be run in parallel. Previously, there was
no default limit unless you specified the "-m" switch when starting
- If you are using a UNIX machine with all database files on local disks,
and no sharing of those databases across NFS filesystems, you can use a
more efficient, but non-NFS-safe, locking mechanism. Do this by adding
the line "lock_method flock" to the /etc/mail/spamassassin/local.cf
file. This is strongly recommended if you're not using NFS, as it is
much faster than the NFS-safe locker.
- Please note that the use of the following command line parameters for
spamassassin and spamd have been deprecated and are now removed. If you
currently use these flags, please remove them:
in the 2.6x series: --add-from, --pipe, -F, -P, --stop-at-threshold, -S
in the 3.0.x series: --auto-whitelist, -a
- The following flags are deprecated and will be removed in a future major
release: --whitelist-factory, -M, --warning-from, -w, --log-to-mbox, -l.
- SpamAssassin runs in "taint mode" by default for improved security.
Certain third-party modules, such as Razor v2, may be incompatible with
taint mode. For Razor v2, you will need to be using v2.40 of
razor-agents or higher which allows taint mode by default. Earlier
versions which are patched to allow taint mode may be used as well.
- Finally, 2.6x deprecated the use of the "check_bayes_db" script, and it
is now no longer available. Please see the sa-learn man/pod
documentation for more info.
Summary of major changes since 2.6x
- Relicensed using Apache License v2.0, instead of dual GPL/PAL licensing,
since we are now an Apache Incubator project.
- SPF testing, if the Mail::SPF::Query module is installed.
- added new rules and code to combat Bayes poisoning text and random
hash-busters; Habeas rules now verify against the Habeas user
list, to combat forged marks used in spam.
- URIDNSBL rules. These do DNSBL lookups on URLs, allowing URLs found
in the message body to be used in spam determination. Added the SURBL
- Spamhaus XBL and a variety of new DNSBL rules
- Hashcash support.
- added Bob Menschel's 'longwords' rules
- added 'backhair' rule, technique based on Jennifer Wheeler's ruleset
- added Matt Kettler's 'antidrug' ruleset
- added anti-fraud rules from Matt Yackley
- added some hostname-based blocklist tests based on the envelope
- a *lot* of other new rules, too many to detail here
- spamd now uses a 'preforking' model instead of 'fork per message'.
- new log format, detailing message-id, resent-message-id, the tests hit,
autolearn status, and several other things in a mass-check compatible
format, to provide more information for spamd log-summarizer scripts.
- Plugins. Third-party modules can now be written and loaded dynamically
from inside SpamAssassin, to provide support for entirely new rule types
or eval tests.
- SQL support for Bayes and AWL storage, thanks to Michael Parker.
See sql/README.bayes and sql/README.awl for additional information.
- ground-up rewrite of the MIME parser. Now deals correctly with complex
MIME structures, including entire message/rfc822 message attachments.
- rules can now test the "MAIL FROM:" address used in the SMTP transactio=
if it was logged to the message headers, using the "EnvelopeFrom"
pseudoheader. This allows rules such as SPF to be applied.
- Added optional faster but NFS-unsafe Bayes locking mechanism, using
- support for parsing mbx mailboxes, as used by UW IMAP. Thanks to John
Newman for this patch.
- refactored configuration parser to split parser code from configuration
- Bayes databases can now be backed up and restored using --backup and
- Config files can now include other files using the "include" command.
- replaced GA-based evolver with fast Perceptron score generation tool by
Henry Stern; scores can now be generated much more quickly.
- The "spamassassin" script can now check collections of mail en masse. =
lets us do things like 'spamassassin -d --mbox file1' and have the
functionality go over the entire mbox file. same for checks, adding to
- Windows support improved.
- Dutch translation, thanks to Jesse Houwing
- Polish translations from Jerzy Szczudlowski and radek at alter dot pl
- French translations, Michel Bouissou
- German translations, Klaus Heinz