Projects / DSPAM


DSPAM is a server-side statistical anti-spam agent for Unix email servers. It masquerades as the email server's local delivery agent and effectively filters spam using a combination of de-obfuscation techniques, specialized algorithms, and statistical analysis. The result is an administratively maintenance-free, self-learning anti-spam tool. DSPAM has yielded real-world success rates beyond 99.9% accuracy with less than a 0.01% chance of false positives.

Operating Systems

Recent releases

  •  03 Aug 2011 19:43

    Release Notes: Support for MySQL 5.5 has been added. Support for MySQL < 5.0 has been dropped. The license has been changed from the GPLv2 to the AGPLv3. There are many bugfixes.

    •  12 Jan 2010 18:09

      Release Notes: This release has many fixes, documentation updates, code cleanups, and other changes. If you are running any of the older RC, BETA or ALPHA releases then you can just upgrade to this release. There are no compatibility issues compared to older ALPHA or older BETA or RC releases. Users using DSPAM 3.8.0 or older can upgrade by following the steps mentioned in the UPGRADING file.

      •  24 Jun 2009 20:38

        Release Notes: This release fixes most stability issues found in older releases. This release has more robust character decoding, HTML mail processing, memory handling, storage engines, SBPH/OSB tokenizing, and much more.

        •  18 Mar 2007 20:35

          Release Notes: This is an unofficial release, but significant. Several significant bugfixes have been made. Bill Yerazunis' Orthogonal Sparse Bigram (OSB) tokenizer algorithm has been added. The code has been significantly optimized to run much faster and with fewer resources.

          •  09 Jun 2006 17:27

            Release Notes: This release includes critical bugfixes for PostgreSQL and LDAP users.

            Recent comments

            17 Aug 2011 10:21 kingradar

            3.10.1 has been released...

            31 May 2009 20:45 dspam

            dspam project under new management!

            dspam is alive and development continues towards the 3.9.0 release. You can find all the latest info at the dspam website ( or over and the sourceforge project pages (

            06 Dec 2006 00:27 dkaufman1

            Cpanel support?
            I spent some time on the nuclearelephant site, reading the FAQ and the Readme, as well as exploring.

            I had a question that I could not find answered and didn't see any forums, maybe I missed them.

            As your FAQ noted, SA is out of date and being circumvented to an alarming degree. My server is a shared server running the Cpanel suite and I was looking for an &quot;installation for dummies&quot; type checklist. (Sorry I am what I am.)

            I can FTP the files up and create a MySQL database with users and assign permissions, but I am a little lost at a lot of the other cmd line functions. Does a step by step install for this type of environment exist?

            Thanks for your patience.

            30 Jan 2006 23:15 jzdziarski

            Re: Can't make heads or tails

            > The documentation for dspam is almost

            > non-existant. How frustrating. I had to

            > make sense of things from the

            > usergroups.

            Hi! Have you checked the doc/ directory, which is full of

            documentation for various types of integration, or the very

            elaborate README? How about the online FAQ, or the many

            links to HOWTOs on the website?

            30 Jan 2006 21:06 kwadrofonik

            Can't make heads or tails
            The documentation for dspam is almost non-existant. How frustrating. I had to make sense of things from the usergroups.


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