I am sure I am not the only person to receive annoying amounts of spam with embedded images and nonsense text around it. In this, the culprits are those wonderful Windoze machines that have been taken over by botnets to generate spam on a flick of a switch. The baynesian filters of spamassassin and other similar tools are being defeated by the inclusion of random, nonsense text. Help!

I run an email server and I have added (via scripts), domain that refer to DSL, cable, and other dynamic IP providers to block out whole chunks of IP#s. I know, I could be blocking a legitimate SMTP server, but I will take the chances.