Announcements
03/20/2026
INFORMATIONAL - USPS Ship (PPC) – Updated Package Transactions Details Data Feed
Release Notes
03/20/2026
May 3 2026 Release Notes
Announcements
03/20/2026
INFORMATIONAL - Upcoming Cust Reg Maintenance - April 18, 2026 (03.20.2026)
Data Files
03/20/2026
Informed Visibility® Mail Tracking & Reporting (IV®-MTR) Development Tracker

This document provides a list of active IV-MTR work to be as well as items completed in FY25.

 

*Please note, Postal Pro is the only source for a current IV-MTR Development log as updates will be made on an ongoing basis.

Release Notes
03/20/2026
Informed Visibility® Mail Tracking & Reporting (IV®-MTR) Release Notes

These release notes summarize new features and enhancements implemented in deployments to the IV-MTR application.

Release Notes
03/19/2026
PTR2 Release Notes_DD_03_21_26
Announcements
03/19/2026
DELIVERY - International Resumption of Mail Service - Effective March 20, 2026
Release Notes
03/19/2026
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. 

Contact Lists
03/19/2026
CASS™ Certified Products Guide: Residential Delivery Indicator Cycle O - (Expires July 31, 2028)
Contact Lists
03/19/2026
RDI™ Cycle O: Certified Products Guide (D) - (Expires July 31, 2028)

This document outlines the CASS/MASS certified vendors list for RDI™ Cycle O.