It may sound very silly but in the last few weeks I’m getting a lot of spam over the msn gateway. Therefore I thought maybe it could be possible to integrate a spamfitler like spamassassin or something similar into the gateways? Maybe not for next version but it would be a “nice to have”.
I havent checked, but maybe Content Filter plugin works with gateways? Of course, you will have to create filtering rules yourself.