Data Files
01/12/2026
Move to Competitive Street Addressing (MTC SA) List

This .txt file contains the MTC SA List.

Announcements
01/11/2026
DELIVERY: Southern Area - Texas 3 District -Stanton Post Office (79782) - Operations Temporarily Suspended
Announcements
01/09/2026
DELIVERY - Hewitt Post Office (07421) - Temporarily Closed
Tech Guides
01/09/2026
2026 Promotions Calendar and Technical Guide
Release Notes
01/09/2026
USPS APIs Release Notes

For the latest updates, please review the USPS APIs Release Notes.

Announcements
01/08/2026
Earn a Free Professional Development Certification From the PCCAC
Release Notes
01/08/2026
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. 

Announcements
01/08/2026
INFORMATIONAL - USPS Mail Flow 101 Webinar Posted To PostalPro
Announcements
01/08/2026
INFORMATIONAL: 2026 Southern Area AIM Meeting - Orlando, Florida - SAVE THE DATE!
Announcements
01/08/2026
INFORMATIONAL: Federal Register: Manifest Mailing System Retiring