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This is the MailMarshal SMTP User Guide (July 2, 2026). The most current version of this document may be obtained from Support.LevelBlue.com/MailMarshal-SMTP/.

Formatting Conventions

This manual uses the following formatting conventions to denote specific information.
Note: This symbol indicates information that applies to the task at hand.
Tip: This symbol denotes a suggestion for a better or more productive way to use the product.
Caution: This symbol highlights a warning against using the product in an unintended manner.

Definitions

This manual uses the following naming conventions. Copyright © 2026 Trustwave Holdings, Inc.