DMM Revision: Addition of Express Mail and Priority Mail Letters and Flats Standards

Effective November 1, 2010, the Postal Service™ is revising sections 200 and 300 of the Mailing Standards of the United States Postal Service, Domestic Mail Manual (DMM®) to add new sections 210, 220, 310, and 320 for Express Mail® and Priority Mail® letters and flats.

This revision does not set any new standards, but instead copies the relevant standards from the current 410 and 420 DMM sections in recognition that not all Express Mail and Priority Mail shipments are parcel-shaped. This will also provide a structure that allows clearer develop­ment of new standards that may be applicable to only let­ter-size or flat-size Express Mail or Priority Mail items.

We will incorporate this revision into the next printed version of the DMM and into the next update of the online DMM available via Postal Explorer® at http://pe.usps.com.