I have searched the forums and the wiki, and have had great luck finding info on improving the spam filters, but nothing on this subject...
I am on a number of distribution lists, that get a great flood of spam daily. I have filters to drop these lists into separate folders, but I would like the spam filter to dump them into junk instead of letting my filters file them away. The spam marking is awesome, and is doing an excellent job, but I need it to actually dump my spam.
I thought about creating a filter for X-Spam=yes and putting that at the top of the list with a "do not process any other filters" flag on, but of course that header is not available in the filter creator, and I'm not familiar with sieve scripts and importing them into the LDAP backend.