Downloading SpamWeed 3.6 from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this software available. The software is included in Communication Tools.
The following versions: 3.6, 3.5 and 2.9 are the most frequently downloaded ones by the program users. Commonly, this program's installer has the following filenames: mcsg.exe, spamstat.exe, spamweed.exe, swengine.exe and swreg.exe etc. We recommend checking the downloaded files with any free antivirus. This program was originally created by Shuttle Technologies. Also the program is known as "SpamWeed rev. 893", "SpamWeed SR-7 rev. 1037", "SpamWeed rev. 34".
From the developer:
Spam filter that uses Bayesian and other statistical technologies, for all POP3 e-mail clients.
You may want to check out more software, such as Chaos Intellect, Live Signatures or RapidCheck, which might be similar to SpamWeed.