USPS Technical Specifications for Mail.dat and Mail.xml
All
USPS Mail.dat Technical Specification
USPS Mail.XML Tech Spec Data Distribution (DD)
USPS Mail XML Tech Spec Facility Access and Shipment Tracking (FAST)
USPS Informed Delivery eDoc Support Mailer Guides
Other
Tech Guides
11/15/2024
Mail.dat Technical Specifications R61.0.0.0 V1

Technical Specifications
06/14/2024
Mail.dat Technical Specifications R60.0.0.0 V3

Technical Specifications
12/12/2023
Mail.dat Technical Specifications R59.0.0.0 V2

Technical Specifications
06/21/2023
Mail.dat Technical Specifications R58.0.0.0 V3

Sort Resources
Filter by Type