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Contact Lists
12/19/2025

Mail Tracking Vendor List

This document provides contact information for a number of third-party service providers who offer mail owner and mail service provider solutions.

Announcements
12/18/2025

DELIVERY - Winter Weather Update December 18

Fact Sheets
12/18/2025

Addressing Fact Sheet for First-Class Flats

This document is for mailers who are sending flat-size mail (such as large envelopes) at Automation and Presorted First-Class Mail prices. To use these prices, you must mail at least 500 pieces at a time, prepared and sorted according to Postal Service guidelines.

Tools
12/18/2025