EDDM OR Every Door Direct Mail service is offered by the United States Postal Service (USPS) that allows businesses and organizations to send advertising mail to every household or business in a specific geographic area without the need for a mailing list.

With EDDM, businesses can target specific neighborhoods or ZIP codes based on their demographics or other characteristics, and send out postcards, flyers, or other promotional materials to every address in that area. This can be an effective way to reach a large number of potential customers at a relatively low cost.