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INFO: What are the Release Notes for MailMarshal SPE 5.3?

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This article applies to:

MailMarshal SPE 5.3

Question:

What are the Release Notes for MailMarshal SPE 5.3?

Information:

The Release Notes included with MailMarshal SPE 5.3 are accurate as of the date of publication.

Build 5.3.0.22502 was published on December 2, 2025.
This article provides any additional information generated after that date.
Full release notes are provided with the installation package.

Upgrade to 5.3 from 5.2.0 only

To upgrade from 4.3.x you must first upgrade to 5.2.0.

SQL Prerequisite Change

The minimum SQL version supported is SQL 2017.

Rule Updates

The latest versions include updated abilities for detection of malware, phishing, and spam. Review the latest MailMarshal default rules and consider updating global policy to use the new features.

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