When
Enterprise DLP
inspects an email, an email header is added to indicate that
Enterprise DLP
has already inspected the email. If
Enterprise DLP
renders a
Block
or
Quarantine
verdict for inspected email, an email header to indicate the verdict is added as well.
Emails that are already inspected are not transported to
Enterprise DLP
a second
time and Microsoft Exchange or Gmail take action based on the existing email
headers.