66% of US Marketers Use Postcards Leave a reply The most common direct mail formats used by U.S. marketers are Postcards (66%), Newsletters (66%), Self-Mailers (56%), Catalogs (48%), and Packages (45%). SOURCE: USPS Direct Mail Report Share: Share on Facebook (Opens in new window) Facebook Share on X (Opens in new window) X Share on LinkedIn (Opens in new window) LinkedIn Email a link to a friend (Opens in new window) Email Print (Opens in new window) Print