Tech Guides
11/26/2025
PostalOne! Release 63.0.0.0 Mail.XML CAT WSDLs

This ZIP file contains the Web Services Description Language (WSDL) and XML Schema Definition (XSD) files for Mail.XML™ CAT Release 63.0.0.0

Presentations
11/25/2025
2026 Mailing Promotions Webinar Slides
Presentations
11/25/2025
2026 Mailing Promotions Webinar
  • 11/25/2025

    Quick Reference Guide: Bundle Preparation and Handling Recommendations

    A guide to ensuring your bundles stay secure during transit.

    • Announcements
    11/24/2025
    DELIVERY: Central Area - Illinois 1 - Wilmette Post Office (60091) - Suspended
    Announcements
    11/24/2025
    DELIVERY: Atlantic Area - Pennsylvania 1 District - Amity Post Office (15311) - Office Temporarily Suspended
    Announcements
    11/21/2025
    PCC Voice Challenge - ThankfulforPCC
    Announcements
    11/20/2025
    INFORMATIONAL - Thanksgiving Holiday 2025 Shipping Recommendations for Lives Animals
    Announcements
    11/20/2025
    INFORMATIONAL - Commercial System Releases – November 20, 2025
    Announcements
    11/19/2025
    DELIVERY - Southern Area – South Carolina District Sunset Post Office (29685) – Closed Indefinitely
    Presentations
    11/18/2025
    Addressing and NCOALink Modernization
    Release Notes
    11/16/2025
    November 16 2025 Release Notes
    Announcements
    11/14/2025
    INFORMATIONAL - Web Tools Migration Webinar
    Announcements
    11/14/2025
    INFORMATIONAL - Scheduled Commercial Systems Activities November 15, 2025
    Announcements
    11/14/2025
    INFORMATIONAL - January 2026 Competitive Price Change
    Announcements
    11/14/2025
    DELIVERY - WestPac -CO-WY District Poncha Springs (81242) - Closed
    Announcements
    11/14/2025
    INFORMATIONAL - Peak Season Network Update Webinars - Follow Up
    Announcements
    11/13/2025
    INFORMATIONAL - January Price Change 2026 - Commercial System Releases January 4, 2026
    Announcements
    11/13/2025
    INFORMATIONAL - Important Update: Periodicals Mailing Privileges Application Process
    Presentations
    11/12/2025
    Addressing Modernization - API
    Fact Sheets
    11/12/2025
    USPS Ship Package Data Feeds

    This document outlines the steps for shippers to access package data feeds through the USPS Informed Visibility Mail Tracking & Reporting (IV-MTR) application.

    Technical Specifications
    11/12/2025
    Addressing API Specifications
    Announcements
    11/10/2025
    INFORMATIONAL - CY2026 Promotions Webinar
    Announcements
    11/10/2025
    INFORMATIONAL - Service Improvement through Increased Capacity
    Technical Specifications
    11/10/2025
    National Change of Address - API