03/19/2024
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.
03/18/2024
02/21/2024
02/09/2024
02/05/2024
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.
01/18/2024
Traditional ACS™ with Shipper Paid Services Technical Guide
This document is a guide that provides technical information about Traditional ACS™ with shipper paid services.
12/21/2023
Informed Delivery API Technical Specifications v4.2.3
Technical Specs are based on v4.2.0 of the XML schemas.
This is the Technical Specifications guide for the Informed Delivery API - Release 4.3 on 3/30/2023
12-21-23 - New version to fix a few minor typos.
12/06/2023
PostalOne! Release 59.0.0.0 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 59.0.0.0
12/06/2023
PostalOne! Release 59.0.0.0 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 59.0.0.0
12/06/2023
PostalOne! Release 59.0.0.0 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 59.0.0.0