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Domestic Mail Manual

Domestic Mail Manual (DMM) effective November 3, 2025

U.S. Postage Rates Effective April 26, 2026

U.S. Postage Rates Effective January 18, 2026

International Mail Manual (IMM) effective November 3, 2025

USPS 2025 POSTAL CUSTOMER GUIDE

Address Quality Fact Sheet

Basic Design Elements For Letters & Cards

PUB 6850: Streamlined Mail Acceptance For Letters & Flats

New Mailing Standards for Lithium Batteries

Streamlined Mail Acceptance For Letters & Flats

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