I had a fix at one point that fixed the apartmentlife mailboxs if I had custom residential mailboxes installed. I am not sure how to explain it I just know that when I had CC mailboxes in the game they overrid the AL mailbox. At first I looked at Squinge, simwardrobe and simlogical, but nothing now I am asking because I have recently moved and am not sure where I packed my back up copies of CC and fixes.
I found it... it was from sim a little dream, and ow now I have a headache.