Pricing & Classification DMM Advisory

Message board to keep postal customers informed of changes to mailing standards, services, and prices.

August 1, 2011

August DMM Update

Postal Explorer® ( is your source for up-to-date mailing standards. The Domestic Mail Manual (DMM®) is fully searchable on Postal Explorer and features fly-out menus, cross-reference links, and an extensive subject index. Today, we updated our mailing standards to capture the following changes:

Media Mail and Library Mail—Consolidation

We revised 170, 370, and 470 to combine the standards for Media Mail® and Library Mail. With that combination, sections 180, 380, and 480 are eliminated.

Use of Precanceled Stamps—Clarification

We revised 234, 244, 334, 344, 434, 444 and 604.3.0 to clarify standards for use of precanceled stamps and the use of mailer's precancel postmarks.

Our next scheduled DMM update is September 6.