I don’t use catch-alls, but you may want to consider Rule 3 of using DH’s junk filter. They do make a good point about catch-alls. “You may not have a “catch-all” set up at a domain that you want to use the Junk Filter with. Catch-alls just generate too much junk mail!” And, they really do.
I don’t work here. I’m just your typical support forum volunteer.