Tech Guides
09/25/2023
MASS™ Technical Guide for Cycle O

This document provides a technical guide for MASS™ Cycle O. MASS™ is an extension of the CASS™ system.

Tech Guides
09/25/2023
CASS™ Technical Guide for Cycle O

This document provides a technical guide for the CASS™ product. The CASS certification process is designed in cooperation with the mailing industry to improve the accuracy and deliverability of addresses for mail qualifying for postal discounts.

Tech Guides
08/17/2023
Informed Delivery Saturation Campaign Mailer Guide

This guide outlines the requirements for participating in and submitting Saturation Campaigns via PostalOne! eDoc (Mail.dat) during the Informed Delivery Promotion. 

For more in-depth details on general promotion requirements, refer to the Promotions page. 

Tech Guides
07/31/2023
Informed Delivery API Technical Specifications v4.2.2 7-31-2023

This is the Technical Specifications guide for the Informed Delivery API - Release 4.3 on 3/30/2023

Technical Specs are based on v4.2.0 of the XML schemas.

Tech Guides
07/09/2023
Zone Charts Matrix Technical Guide (Effective - July 2023)

This guide details technical information about the National Zone Charts Matrix. A few topics in this guide include Defining a Zone, Matrix File General Information, and Matrix Zone Determination.

Tech Guides
06/27/2023
Trailing Edge Die-Cut (Ted-C) Letters Template

Template with instructions for Trailing Edge Die-Cut (Ted-C) Letters.
Template must be printed at "actual size".

Tech Guides
06/12/2023
Informed Delivery Mail.XML Mailer Guide

This is a guide for submitting campaigns to PostalOne! via Mail.XML electronic documentation (eDoc).

Tech Guides
06/12/2023
Informed Delivery Mail.dat Mailer Guide

This is a mailer guide for creating campaigns via PostalOne! through Mail.dat eDoc submission.

Tech Guides
06/08/2023