Message tags are sent to notify a recipient that the email message was processed and contained suspicious or malicious content. After investigation, Deep Discovery Email Inspector assigns a risk level to suspicious email messages. Configure unique message tags for different policy actions based on the risk level.
Message tags include the following items:
A file that replaces a stripped suspicious attachment
Text appended to the end of the message
For information about how Deep Discovery Email Inspector assigns the risk level, see Detected Risk.