What happens to fan mail?

Good afternoon to all, hope the day is a good one for you,

Today, I found a story at "The Smoking Gun" website that mentioned someone finding a discarded box (sittin' out on the curb) filled with fan mail for Mariah Carey. The Smoking Gun site being what it is..... of course they printed examples from the box. If you've never visited that site before, take a look through their archives, you'll find all sorts of legal documents and other (sometimes odd) information on their pages. I'm wondering what the official response will be from the star's publicist, I'll bet it will have something to do with the box being mistakenly included with items that were to be thrown out *LOL, as that seems to be the standard type of explanation when something like this happens. Still was interesting to read the sort of mail that famous people receive, some sounded a bit creepy.