United States Postal Service doesn’t have a preferred mail service provider list. It appreciates you to promote the Every Day Direct Mail service.
It can give you the trademarks of Every Day Direct Mail Service and other Postal Services. For detailed information you can call at:
Important Note: Licensing agreements do not convey or imply any sort of endorsement, preferred or otherwise. The Postal Service™ cannot endorse nor recommend any given mail service provider, and the Postal Service™ does not select or endorse parties as EDDM® service providers, or authorize parties to use words to the effect that they are preferred EDDM® providers or vendors, or have been selected, endorsed or otherwise approved by the Postal Service™ to provide EDDM® services.