Relevant Products: Exclaimer Cloud - Signatures for Office 365, Exclaimer Cloud - Signatures for G Suite.
Subject line trigger rules allow you to specify whether a server-side signature should be applied to a message based on words or phrases found in the subject line of the message.
A trigger word/phrase can be included in the subject line of an email by an end user to allow them to specify that a particular signature should be used.
The trigger word/phrase can be removed by Exclaimer Cloud once the email has been processed.
Composing a message with subject line trigger rules:
Received message with alternative signature and subject line trigger word removed: