Every Door Direct Mail (EDDM) is a service offered by the USPS designed to help small businesses market themselves to their local community. You don't need specific names or addresses; you just need to know the zip code of any neighborhoods you want to contact. It's an affordable way to expand a company's reach. 

The USPS offers solutions for businesses of all sizes and marketing goals. Many smaller businesses prefer to market locally; they can use EDDM to target specific neighborhoods they may be familiar with. For example, a local pizza restaurant may target a 5 mile radius near college areas while a law firm targets downtown or areas with a lot of office buildings.