User Guides
10/26/2021
10/26/2021
How to Submit Mail.dat Jobs to PostalOne!®
This document is a comprehensive guide that outlines steps for exchanging electronic data with the PostalOne!® system using the Mail.dat file format.
User Guides
10/26/2021
10/26/2021
How to Submit Mail.XML Jobs to PostalOne!®
This guide provides step‐by‐step instructions for submitting electronic mailing information into the USPS® for Full‐Service letters & flats.