Spam Control

i have just found an interesting tool called mail box guard. it is not free. http://www.regnow.com/softsell/nph-softsell.cgi?item=8243-1&affiliate=13232

same author has free startup-guard. use it-it is necessary.

alternative is spamihilator- newest version deletes before downloading mails.

Try ASSP http://sourceforge.net/projects/assp/. After a 2 week priming period this reduced my spam problem from around 500 a day to <5. It's certainly not the simplest to implement but is highly effective and is also free (GPL).

If you're looking to implement on your clients I'd recommend trying SpamBayes http://sourceforge.net/projects/spambayes/ which is also GPL and I've found to be at least as effective as any commercial offering I've tried.

See the following URL w/no spaces in address
http://www.portland.nl/img/SecurityToolsForSpamControl.pdf

By far the best SPAM filter I've seen is SafetyBar by CloudMark. It learns from its users and is always stopping more and more spam.

http://www.cloudmark.com/products/safetybar/