I'd like to be able to use one filter in other filters. for example, I have one filter set up to label emails from a group of people, and another to move email that I'm bcc'ed on (spam) to another folder. I'd like to invert the first filter in the second filter, i.e.: "freinds" = Sender: contains "address 1" OR sender contains "address 2" etc "spam" = To: doesn't contain "my email address" AND doesn't match "freinds" right now I have to duplicate the first filter in the second filter to make sure that I actually see the emails that my freinds bcc me.

dup of bug 13145?

Also see bug 120160 which is a an RFE for a whiltelist filter. I don't think this is a dupe of bug 13145 but bug 34340 might come close. Have a look at the various bugs in the dependency tree of bug 66425.

There are a lot of duplicates out there about spam filtering ideas, all have their own tweak. Calling this a duplicate of 34340. *** This bug has been marked as a duplicate of 34340 ***

marking verified as duplicate

[RFE] is deprecated in favor of severity: enhancement. They have the same meaning.