Announcements
10/23/2026
INFORMATIONAL - Commercial System Releases – October 28, 2026 and November 1, 2026
Announcements
10/23/2026
INFORMATIONAL - PostalOne! Alert – October 25, 2026
Announcements
10/23/2026
INFORMATIONAL - Informed Delivery Mailer Campaign Portal (MCP) Scheduled Outage on October 24
Announcements
10/23/2026
INFORMATIONAL - Postal One System Promotions Not Applied to Postal Wizard Statements
Release Notes
10/23/2026
November 1 2026 Program Registration 31.4.0.0 Pre-Release Notes
Contact Lists
10/23/2026
Mailers Technical Advisory Committee (MTAC) Membership Roster and Vacancies
Program Requirements
10/23/2026
Plus One Product Requirements (Technical) (Updated 10/23/26)

Plus One Updated 10/23/26

Fact Sheets
10/22/2026
Intelligent Mail® for Small Business (IMsb) Fact Sheet

This fact sheet contains an overview of the IMsb Tool, its benefits, and how it works.

Announcements
10/21/2026
DELIVERY - UPDATE - Akron Post Office (35441) Suspended Temporarily
Announcements
10/21/2026
INFORMATIONAL - European Union Requirements for Product Identifiers Effective November 1, 2026