I set up my own spam filter to take any address not in my personal address book or in a an address book of allowed organizations and put it in the spam folder. It stopped working a few months ago. I may have messed up my personal address book by trying to eliminate duplicates. I made a mistake and ended up with even more more duplicates. I set that project aside, but somehow the filter stopped working. Filters that don't depend on the address book continue to work. Not sure why the address book filter doesn't work. Even if there are duplicates, the algorithm needs to check every one to be be sure the From address is not there. But nothing gets moved out. It's as though everything were somehow in the address book or the address book has nothing in it. But it does have addresses--lots of them.