Well, I would expect that to include such bounce message (or either, a better wording). Probably something like the typical:

      gmail-smtp-in.l.google.com [74.125.71.26]:
 >>> DATA
 <<< 552-5.7.0 This message was blocked because its content presents a potential
 <<< 552-5.7.0 security issue. Please visit
 <<< 552-5.7.0  https://support.google.com/mail/?p=BlockedMessage to review our
 <<< 552 5.7.0 message content and attachment content guidelines. d69si1606333wmd.209 - gsmtp