Has to do with the joy that is working with the MAL (part of the infamous DOH layer in Unity - COM based interface into directory and message data that COBRAS has to use).
Very short version - there _are_ filters and sorting triggers that can be requested, however there are many versions and configurations that cause it to blow up entirely and drop you out with a big pile of nothing. For instance none of them work for Domino, and the Exchange based items work most of the time depending on the version of Unity and the version of Exchange in play, but it can't be trusted.
Yes... MOST of the time the messages returned on a raw MAPI fetch are in order but you can't count on it. So rather than risk missing messaeges of any kind I kept it simple and annoyingly inefficient and it plods through the entire inbox to check them all.
I consider offering a "I'm feeling lucky" command line override to kick the filter in or something but that's a tough sell for the cycles to spend on dev and testing I'm afraid.
