USPS Updates Mailing Standards for Flats, Parcels, and Periodicals
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Table of Contents
The Postal Service has finalized changes to its Domestic Mail Manual that take effect July 12, 2026. These updates adjust how certain types of mail are priced and prepared, focusing on simplifying categories and aligning standards across different mail products.
Why it matters: These adjustments are primarily administrative, designed to streamline how mailers prepare and pay for postage by reducing complex rate categories. While the changes do not drastically alter overall costs for most senders, they require updates to mailing software and preparation procedures. Mailers who frequently use Periodicals or heavy Marketing Mail flats will see specific procedural shifts that could affect their operational efficiency and compliance requirements.
Who it affects
- Commercial mailers sending First-Class Mail, Marketing Mail, and Periodicals
This rule was published by the Postal Service in the Federal Register; readers should verify specific rate tables and preparation details against the official Domestic Mail Manual amendments before making operational changes.
Agency: Postal Service
Source: Federal Register — read the official document