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

Certified Mail®

Certified Mail is an extra service that provides the sender with a mailing receipt, tracking history, and, upon request, electronic verification that a mail piece was delivered or that a delivery attempt was made. Certified Mail can be used with both First-Class and Priority Mail, and items sent with this extra service are dispatched and handled in transit as ordinary mail.  This guide provides an explanation of the product, the different types of Certified Mailings, and instructions for preparing Certified Mail.

Experience the 2024 National Postal Forum (NPF) Exhibit Hall

USPS Ship Webinar 04242024

USPSShip Webinar 05082024

Speakers Bureau List 4.0 April 2024

INFORMATIONAL: Commercial System Releases May 12, 2024