Contact Lists
02/25/2026
USPS® Approved Manufacturers of Mailing Containers for Adult Birds

A list of contact information for adult bird container manufacturers that have been certified by USPS.

Error Codes
02/24/2026
Known Issues List 2.24.2026
Announcements
02/24/2026
Informational - USPS Webinar on AI, Direct Mail and Mailing Promotions
Release Notes
02/24/2026
July 2026 Release Overview

Note: For the latest technical specifications, please see the July 2026 Price Change Release Notes as they are published. Mail.dat and Mail.XML updates required for this release. 

Data Files
02/24/2026
Pending Route Adjustment File

This Excel sheet details route adjustments for February 2026 thru April 2026.

Announcements
02/23/2026
INFORMATIONAL: USPS Modernization through Package Equipment Upgrades in February and March 2026
Announcements
02/23/2026
PROCESSING AND DISTRIBUTION: USPS Closures Due to Weather Impacts Across the Northeastern United States
FAQs
02/23/2026
Periodicals Application Process FAQ
FAQs
02/23/2026
Periodicals Application Process FAQ
Announcements
02/23/2026
INFORMATIONAL - Mail Growth Incentive - Upcoming Important Dates