Postal Explorer® (
pe.usps.com) 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.
