Announcements
03/19/2026
03/19/2026
Release Notes
03/19/2026
03/19/2026
July 2026 Release Overview
Note: For the latest technical specifications, please see the July 2026 Price Change Release Notes as they are published. Mail.dat and Mail.XML updates required for this release.
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03/19/2026
03/19/2026
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03/19/2026
03/19/2026
RDI™ Cycle O: Certified Products Guide (D) - (Expires July 31, 2028)
This document outlines the CASS/MASS certified vendors list for RDI™ Cycle O.
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03/19/2026
03/19/2026
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03/19/2026
03/19/2026
Contact Lists
03/19/2026
03/19/2026
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03/19/2026
03/19/2026
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03/19/2026
03/19/2026
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03/19/2026
03/19/2026
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03/19/2026
03/19/2026
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03/19/2026
03/19/2026
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03/19/2026
03/19/2026
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03/19/2026
03/19/2026
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03/19/2026
03/19/2026
Contact Lists
03/19/2026
03/19/2026
Contact Lists
03/19/2026
03/19/2026
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03/19/2026
03/19/2026
Contact Lists
03/19/2026
03/19/2026
Contact Lists
03/19/2026
03/19/2026
Contact Lists
03/19/2026
03/19/2026
CASS™/MASS™ Certified Products Guide - All Sections Data Files Cycle O - (Expires July 31, 2028)
This document contains the certified vendors list for CASS™ and MASS™ products for Cycle O.
Data Files
03/19/2026
03/19/2026
Z4 Info File
A downloadable ZIP file containing information related to the Z4 Info File
Data Files
03/19/2026
03/19/2026
Early Warning System (EWS002C0.ZIP)
This file is the EWS production file and is updated weekly. This file contains the Early Warning System data file for the CASS™ and MASS™ certification process.
Announcements
03/18/2026
03/18/2026