I am surprised that the post office hasn't done or said anything or required anything of the apartment owner. You may wish to contact the postal inspector and file a complaint because by law someone other than the person to whom mail is addressed cannot accept the mail. There are a whole host of legal reasons but bottom line is the type of mail delivery you are describing does not appear to be legal. The U.S. Post Office has many delivery questions and answers in its FAQs section so you may wish to seek clarification on home delivery or consider opening a post office box to which you have access at any time. Even if you had something like central point delivery, there could be for those batch of apartment one unit with your individual compartment or lock box.