Sometime you don’t know how to handle with web advertiser spam or you don’t want to create rule to block spam site one by one. Here is have solution for you to block web advertiser spam like stock spam or sell product spam.
Apache SpamAssassin 3.1.8 is now available! This is a maintenance and security release of the 3.1.x branch. It is highly recommended that people upgrade to this version. Downloads are available from: spamassassin.apache.org/downloads.cgi?update=200702131100 The release file will also be available via CPAN in the near future.
Today I found the strange name of User-Agent from log file that access to webboard and random post with message with url Mozilla/2.0 compatible; Check&Get 1.14 (Windows NT) I create new mod_security rule to block this spammer PLAIN TEXT CODE: SecFilterSelective "HTTP_USER_AGENT" "Mozilla/2\.0 compatible; Check\&Get 1\.14 \(Windows NT\)" "log,deny"
I found it on spamassassin svn trunk and you may got some ideas from this rules
Clifton's test rules for drug spam that uses obfu drug names, and doesn't mention the real name