Featured Updates
10/08/2024
08/22/2024
09/10/2024
October 2024 Planned Changes
Mail.dat Client update is required.
Publication for Streamlined Mail Acceptance for Letters and Flats (Pub 685)
Streamlined Mail Acceptance for Letters and Flats (Pub 685) contains the policies and processes for the verification of eligible business mailings using tools provided by Intelligent Mail® Full-Service, eInduction, and Seamless Acceptance.
06/21/2024
02/27/2024
Election Mail and Ballot Mail STID Finder
The Election Mail and Ballot Mail Service Type IDentifier (STID) Finder is a tool designed to assist election officials and their mail service providers in selecting an appropriate Election Mail and Ballot Mail STID for their outbound mailings.*
08/28/2024
First-Class Mail and Marketing Mail Growth Incentives FAQs
On September 27, 2023, the Postal Regulatory Commission (PRC) approved the Postal Service request to make Mail Classification Schedule (MCS) changes to establish two distinct Mail growth incentives — a First Class Mail Growth Incentive and a Marketing Mail Growth Incentive.
Latest Updates
10/17/2024
10/16/2024
10/16/2024
MASS™ Technical Guide for Cycle O
This document provides a technical guide for MASS™ Cycle O. MASS™ is an extension of the CASS™ system.
10/15/2024
Move to Competitive Street Addressing (MTC SA) List
This .txt file contains the MTC SA List.
10/15/2024
PostalOne! Contingency Plan
Learn what to do in the event a system outage prevents you from submitting your mailing information electronically.
USPS Service Alerts
Receive near real-time notifications about postal facility service disruptions due to weather-related outages and other natural disasters or events.
Stay Informed About Postal Policy
Updated daily, the Federal Register Notices offer detailed information regarding official USPS policy and regulatory changes.
Intelligent Mail: Featured Resources
Publication for Streamlined Mail Acceptance for Letters and Flats (Pub 685)
Streamlined Mail Acceptance for Letters and Flats (Pub 685) contains the policies and processes for the verification of eligible business mailings using tools provided by Intelligent Mail® Full-Service, eInduction, and Seamless Acceptance.