[dspam-users] DSPAM v3.6.0-STABLE

Version: 3.6.0
Release Date: October 17, 2005
Website URL: http://dspam.nuclearelephant.com

Release Notes:
RELEASE 3.6.0-STABLE

ENHANCEMENTS

Automatic Whitelisting Improvements
Automatic whitelisting has been converted into more of a trusted sender
reputation type system. Instead of senders having to send you zero
spam in
order to be whitelisted, they will have to send you less than one
spam for
every fifteen legitimate messages. This means a user with whom you've
conversed
much and exchanged 45 innocuous messages with will be allowed to spam
you up
to three times before they'll lose their whitelisting status.

Dynamically Loadable Storage Driver Support
DSPAM now supports a dynamically loadable storage driver plugin
codebase,
which allows third party driver authors to more easily build new
drivers, and
packagers to build and distribute dspam with multiple storage drivers.

PostgreSQL Performance Enhancements
PostgreSQL enhancements have been made for installations of v8.0+,
speeding
up processing up as much as three times.

LDAP Verification
LDAP Verification can be used with some storage drivers (such as
MySQL and
PostgreSQL) and allows DSPAM to verify that a user exists in LDAP before
adding them to the system locally. This is ideal for virtual user
scenarios
where DSPAM is left to validate users.

Unified Spam Alias / UID in Signature Support
The MySQL and PgSQL storage drivers now support embedded user id's in
the
message's signature identifier. This means you can now configure a
single
system-wide spam alias and have DSPAM set the user based on that
specified in
the signature. No more long alias lists to maintain.

Domain Based Delivery Hosts
Support for using different delivery hosts for each domain has been
added.
Each domain and its delivery host can be configured in dspam.conf.

Integrated Clam A/V Support
DSPAM can now communicate directly with clamd (using streaming mode)
to check
all messages for viruses. Upon detection, DSPAM can act one of three
ways:
reject the message with a permanent error, accept the message and
quietly
drop, or treat the message as spam.

Markovian Discrimination
Added support for Markovian weighting, enabling DSPAM to perform as a
Markovian
classifier. These functions were based on Bill Yerazunis' published
research
describing the techniques used in CRM114. Markovian weighting is a
lexically
verbose approach to filtering spam, and provides rather impressive
results.
See doc/markov.txt for more information

Self-Contained Hash Driver
Inspired by Bill Yerazunis' CRM Sparse Spectra (CSS) storage
algorithm, the
hash driver (hash_drv) is a very fast, self-contained storage driver
using a combination of random access files and hash overflow. It
requires no
dependencies and outperforms all other storage drivers. Support for
auto-
extending files is included, which allows a database to grow as needed.
Other management tools, such as cssstat and csscompress, are also
included.

Fallback Domain-Based User Support
Fallback domain support can be used by systems where a user's full
email address
is provided as the username, and allows nonexistent users to fall
back to
@domain.tld as the username. Ideal for configuring pass-thru.

Improved, Unified Logging
All logging functions have been consolidated into two functions - one
for
debugging-only messages, and one for system messages. All system
messages are
now logged to syslog, stderr, and debug (if debug is active). This
should
improve the quality of what is logged to the system log.

Activity logging has also been improved and the retrain log has been
eliminated
entirely. Instead, events are logged with different status codes and
info
text to the user's primary log (and system.log).

Plused Detail Support
Support for mailboxes using plused detail (e.g. username+mailbox) has
been
added. DSPAM will ignore everything after + when setting the
username, and
attach it upon delivery.

Message Fragments Support
DSPAM can now be configured via a user preference to store 1K of each
message
processed on the server. This can be used by some GUIs (such as the
DSPAM
Appliance UI) to display message fragments from history.

Domain Blocklisting Support
Added support for per-user blocking of certain messages coming from
undesirable domains. Blocklisted messages are quarantined, but not
learned as
spam.

Other Enhancements:
   User preferences made case-insensitive
   LMTP error codes now include messages from relay host
   RBLInoculate option allows RBL'd emails to be quarantined or
learned as spam
   MySQL and PgSQL object creation scripts updated to improve
performance
   Added 'date' to quarantine display and sorted most recent at top
   Significant code cleanup and audit
   Domain-based groups changed from @domain.tld to *@domain.tld
   X-DSPAM-Result expanded to support Virus, Blacklisted, and
Blocklisted results
   DSPAM WebUI now supports history paging
   Rewritten documentation for ease of installation
Received on Sun Oct 16 22:12:23 2005