User Guides
07/31/2025
Mailing and Shipping Solutions Center (MSSC) Topics

List of topics the MSSC can assist with. To reach the MSSC, email us at MSSC@usps.gov or call 1-877-672-0007 from 7:00AM – 7:00PM CT.

User Guides
07/25/2025
July 2025 PCC Membership Best Practices Guide
User Guides
07/24/2025
Informed Delivery Add-On Batch Upload Guide Video
User Guides
07/24/2025
Integrated Technology Batch Upload Guide Video
User Guides
07/24/2025
Integrated Technology Batch Upload Guide
User Guides
07/24/2025
Informed Delivery Add-On Batch Upload Guide
User Guides
07/24/2025
Catalog Insights Single Pre-Approval
User Guides
07/24/2025
First Class Mail Advertising Template
User Guides
07/24/2025
First Class Mail Advertising Template
User Guides
07/24/2025
Sustainability Add-On Template