[CS-FSLUG] Junk mail filters

[Yama Ploskonka]

I run Thunderbird, and would like to have it junk automatically stuff on 
CS-Flug that had nothing to do with Free Software or Linux.  Any ideas?

Of course I'd rather not quit the list, but so far that seems like the 
only option, because even if I filter out the usual suspects, there are 
replies from people who usually do contribute on-topic and such that I 
do not know how to filter out only in the case it follows off-topic threads.

Ideas welcome

Yama