DSPAM
From Wikipedia, the free encyclopedia
| DSPAM | |
|---|---|
| Latest release | 3.8.0 / March 19, 2007 |
| OS | Unix-like |
| Genre | Email spam filter |
| License | GPL |
| Website | dspam.nuclearelephant.com |
DSPAM is a free software statistical spam filter written by Jonathan A. Zdziarski, author of the book Ending Spam (ISBN 1593270526) and other books. It is intended to be a scalable, content-based spam filter for large multi-user systems. DSPAM is distributed under the terms of the GNU General Public License
The project consists of a library, libdspam, which contains the core filtering and storage routines, and command-line and web-based interfaces. DSPAM is MTA-independent, can store spam classification data in a number of database formats, and uses bayesian filtering, among other techniques, to learn and adapt to spam.
DSPAM's original author claims that some users of DSPAM have reported as high as 99.5 to 99.95% accuracy, including "best recorded levels of accuracy ... 99.991% by one avid user (2 errors in 22,786) and 99.987% by the author."[1] However, at the spam filter test performed at TREC 2005[2] the best-performing DSPAM configuration had misclassification rates worse than other filters in the test and below stated levels of accuracy. Zdziarski has raised many concerns about the validity of the tests and the ability of the test harness' author, Gordon Cormack, to adequately provide a true simulation.
The rights to the project were sold to Sensory Networks in May 2007[3] and the DSPAM website is no longer active.
Development of DSPAM has begun to resume, as of December 2007, with Sensory Networks publishing 27 community-created patches to the CVS tree, along with a new PHP-based WebUI in development.
