Erich Schubert commented a bit on my post concerning filtering. He just wants his filter to run on his server. I agree, that’s where I want it to run as well. However, sometimes I subscribe to a mailing list, then realize a bit too late what I should have filtered on, so I have some mails I’d like to get refiltered. As I am lazy, I would very much the suggestion from my MUA to be somewhat intelligent. Call it intelligent refiling support or something like that. It is also a nice way to check that your mails will actually be filed in the right folder when you get more mails that will hit the rule.