[Skunkworks] MDaemon Content Filter file [cfrules.dat] help needed

Hi people, I am trying to edit the cfrules.dat file to create a certain rule that's a problem to define. I would like to filter email messages containing user1@mydomain in either TO or CC fields AND NOT user2@mydomain in neither TO nor CC fields. I'm talking of something kinda like this: [(TO:user1 OR CC:user2) NAND (TO:user2 OR CC:user2)] Anybody ever tried something of this sort on MDaemon? Thanks in advance. Me.