The DMM provides the United States Postal Service's official prices and standards for all domestic mailing services. The most recent issue of the DMM was updated on November 2, 2026.
This issue of the DMM contains all Postal Service domestic mailing standards and continues to: (1) increase the user's ability to find information; (2) increase confidence that users have found all the information they need; and (3) reduce the need to consult multiple chapters of the DMM to locate necessary information. The issue updated on November 2, 2026, sets forth specific changes, including new standards throughout the DMM to support the standards and mail preparation changes implemented since the version updated on April 7, 2025.
The online version of the DMM is available via the Postal Explorer® website at:
pe.usps.com.
Changes to mailing standards will continue to be published through
Federal Register
documents and the
Postal Bulletin
and will appear in the next online version of the DMM.
1. The authority citation for 
39 CFR Part 111 continues to read as follows:
5 U.S.C. 552(a); 13 U.S.C. 301-307; 18 U.S.C. 1692-1737; 39 U.S.C. 101, 401-404, 414, 416, 3001-3018, 3201-3220, 3401-3406, 3621, 3622, 3626, 3629, 3631-3633, 3641, 3681-3685, and 5001.
2. Amend § 111.1 by revising paragraph (b) to read as follows:
Incorporation by reference; Mailing Standards of the United States Postal Service, Domestic Mail Manual.
* * * * *
(b) The Director of the Federal Register approved the DMM, updated November 2, 2026, for incorporation by reference as of November 4, 2026.
3. Amend § 111.3 by adding a new entry to the end of table 1 to § 111.3 to read as follows:
Amendments to the Mailing Standards of the United States Postal Service, Domestic Mail Manual.
* * * * *
Table 1 to § 111.3—Domestic Mail Manual
| Transmittal letter for issue |
Dated |
Federal Register publication |
| |
|
|
| * * * * * * * |
| DMM |
November 2, 2026 |
[INSERT FEDERAL REGISTER CITATION FOR THIS FINAL RULE]. |