USPS PostalPro

News from PostalPro.
This file is the EWS production file and is updated weekly. This file contains the Early Warning System data file for the CASS™ and MASS™ certification process.
Read more...
Z4 Info File
PostalPro 11/28/2025 07:00
A downloadable ZIP file containing information related to the Z4 Info File
Read more...
This spreadsheet includes NCOALink statistics from 2007-2024 by licensee type.
Read more...
This ZIP file contains the Web Services Description Language (WSDL) and XML Schema Definition (XSD) files for Mail.XML™ PROD Release 63.0.0.0
Read more...
This ZIP file contains the Web Services Description Language (WSDL) and XML Schema Definition (XSD) files for Mail.XML™ TEM Release 63.0.0.0
Read more...