Release Notes
03/13/2026
March 22 2026 Release Notes
Release Notes
03/06/2026
PTR2 Release Notes_DD_03_07_26
Release Notes
03/04/2026
PTR2 Release Notes_DD_03_03_26
Release Notes
03/04/2026
March 8 2026 Release Notes
Release Notes
03/02/2026
PTR2 Release Notes_DD_02_28_26
Release Notes
03/01/2026
March 1 2026 Release Notes
Release Notes
02/26/2026
February 26 2026 Release Notes
Release Notes
02/26/2026
February 25 2026 Release Notes
Release Notes
02/25/2026
USPS APIs Release Notes

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

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.