Informed Delivery Mail.XML Mailer Guide

This is a guide for submitting campaigns to PostalOne! via Mail.XML electronic documentation (eDoc).

Informed Delivery Mail.dat Mailer Guide

This is a mailer guide for creating campaigns via PostalOne! through Mail.dat eDoc submission.

eVS to USPS Ship Migration Tech Sheet

The Postal Service is retiring the electronic verification system (eVS). eVS customers must migrate to USPS Ship or USPS APIs by February 2025. This includes customers using Premium Forwarding Services Commercial (PFSC) and Click N Ship BusinessPro (CNBPro). This document outlines the differences between the two platforms and steps to migrate from eVS to USPS Ship.

Guide to USPS Ship for eVS Shippers

Secure Destruction Technical Guide

A technical reference for implementing the Secure Destruction process

ACS™ Electronic Product Fulfillment (EPF) Fulfillment File Access

Learn the different methods of accessing your ACS™ files from EPF.

PostalOne! Release 61.0.0.0 Mail.XML PROD WSDLs

This ZIP file contains the Web Services Description Language (WSDL) and XML Schema Definition (XSD) files for Mail.XML™ PROD Release 61.0.0.0

PostalOne! Release 61.0.0.0 Mail.XML TEM WSDLs

This ZIP file contains the Web Services Description Language (WSDL) and XML Schema Definition (XSD) files for Mail.XML™ TEM Release 61.0.0.0

PostalOne! Release 61.0.0.0 Mail.XML PrePROD WSDLs

PostalOne! Release 61.0.0.0 Mail.XML CAT WSDLs

Mail.dat Technical Specifications R61.0.0.0 V2

Mail.XML Technical Specifications R61.0.0.0 V1

MASS™ Technical Guide for Cycle O

This document provides a technical guide for MASS™ Cycle O. MASS™ is an extension of the CASS™ system.

Business Customer Gateway: Overview and Tour

This presentation provides an overview of the Business Customer Gateway and a tour for new users. 

Publication 205 Electronic Verification System (eVS®) Business and Technical Guide

API Tech Sheet

The USPS API Platform provides a dynamic, one-stop-shop of shipping capabilities to expand business reach
and increase efficiency. The USPS suite of APIs enables integrators to standardize an address, price a
package, create a label, find a USPS acceptance facility, schedule a carrier pick-up, and track a package from
entry to delivery. The USPS API platform also offers webhooks for near-real-time push notifications for tracking
events.

Zone Charts Matrix Technical Guide (Effective - June 2024)

This guide details technical information about the National Zone Charts Matrix. A few topics in this guide include Defining a Zone, Matrix File General Information, and Matrix Zone Determination.

PostalOne! Release 60.0.0.0 Mail.XML PROD WSDLs

This ZIP file contains the Web Services Description Language (WSDL) and XML Schema Definition (XSD) files for Mail.XML™ PROD Release 60.0.0.0

PostalOne! Release 60.0.0.0 Mail.XML PrePROD WSDLs

This ZIP file contains the Web Services Description Language (WSDL) and XML Schema Definition (XSD) files for Mail.XML™ PrePROD Release 60.0.0.0

PostalOne! Release 60.0.0.0 Mail.XML TEM WSDLs

This ZIP file contains the Web Services Description Language (WSDL) and XML Schema Definition (XSD) files for Mail.XML™ TEM Release 60.0.0.0

PostalOne! Release 60.0.0.0 Mail.XML CAT WSDLs

ACS™ Electronic Product Fulfillment (EPF) Download Manager Technical Guide

Documentation for the Client Side ACS™ EPF Download Manager software package.

CASS™ Technical Guide for Cycle O

This document provides a technical guide for the CASS™ product. The CASS certification process is designed in cooperation with the mailing industry to improve the accuracy and deliverability of addresses for mail qualifying for postal discounts.

Intelligent Mail® Package Barcode (IMpb) ACS™ Technical Guide

Technical guide for users of Intelligent Mail® Package Barcode (IMpb) Address Change Services (ACS). Includes a solution overview, features, participation requirements, and service endorsement options.

Traditional ACS™ with Shipper Paid Services Technical Guide

This document is a guide that provides technical information about Traditional ACS™ with shipper paid services.