Evidently if you contact the services listed below, you can get rid of 90% of the junk postal mail you receive.
This is the Postal Service Statement:
The Postal Service must deliver all properly posted mail. You can, however, reduce the amount of advertising mail you receive by contacting the following organizations to request removal of your name from mailing lists:
Mail Preference Service
Direct Marketing Association
P.O. Box 282
Carmel, NY 10512-0282
Trans Union LLC
Name Removal Option
P.O. Box 505
Woodlyn, PA 19094-0505
Experian Consumer Services
901 W. Bond Street
Lincoln, NE 68521-3694
Equifax Inc.
Name Removal Option
P.O. Box 740241
Atlanta, GA 30374-0241
Up to 90 percent of mailing lists are accessed by this process. Registrants generally note a decrease of unsolicited mail one to three months after their names are listed. Since some customers may receive mail under various names, include alternative names or spellings to ensure that the advertiser's mail is stopped.
In summary, by law we must deliver ALL mail that has been paid for - including your private personal mail and that of businesses and organizations.