As an agent, you can see messages (such as emails, SMS, and social media messages) that were ignored or not handled by you or were not routed to you as a result of a system error. Also shown are messages that you sent but did not reach their intended destination because they are awaiting to be approved by your supervisor.
Procedure
Note: you can delete a message that is awaiting approval by your supervisor but you cannot perform any other action on it (such as reply to it).