Out of all anti-spam software I’ve tested so far, DSPAM is by far the best one. Fast and very efficient.
DSPAM author Jonathan A. Zdziarski just released an unofficial 3.8.0 version:
“I know it’s been a long time since the last DSPAM release, and I’ve decided - after much testing over the past year - that it was good and appropriate to release the changes in CVS. Because the configuration has changed to some degree, and new features have been added, I thought it best to call this release 3.8.0 instead of 3.6.9, as I had been originally planning. Don’t be fooled, though - it’s very similar to 3.6, but has been optimized significantly and some important bugfixes have been made.”