Originally Posted by HoyaTerp

Here's something you can try and it worked for me. Open the junk mail, and on the reply slip (the part with your name and address that you'd mail back) write: "No such person. Remove from mailing list immediately!" Then stuff everything they sent, including the original envelope, into the postage-paid reply envelope and mail it back. Believe me, they won't want to keep paying the postage for this so they'll take you off the list in a hurry. Doing this put an end to 75% of my junk mail in about three months.