Every Door Direct Mail (EDDM) is an affordable targeted advertising technique that lets you map your marketing mail audience by age, income, or household size. You can use the EDDM mapping tool to choose the ZIP Code and carrier route that will target your best possible customers—current and future. The Every Door Direct Mail-Retail price per piece for Flats weighing no more than 3.3 oz is $0.178. Bundling options available in 50 or 100 per stack.