Since telemarketers were mentioned on here, I have a similar issue with my mail. Somehow I got on a mailing list for hearing aids. I dont have any hearing problems whatsoever, and have no need for a hearing aid.
It began several years ago, with one company sending me their spam in an envelope, which is a plain white envelope, so I never knew what it was till I opened it. This company sent me their junk about 3 times a month. But it appears they sold my name to other hearing aid companies, so now I get this junk almost daily. I'd really like to be taken off their mailing list. But how do I do it????
To me, the mailbox is nothing but a thing to annoy me, because anything worthwhile is always buried in garbage. I find it really annoying to waste my time opening their crap. I have sort of learned their return addresses, so I just toss it in the trash before opening it, but the amount keeps growing, and the return addresses keep changing....