If you configure the transport rule with the action
send bounce message to sender with enhanced status code in this scenario, the sender receives a non-delivery report (NDR) that resembles the following message.
From: <PostMaster> Sent: <Date, Time> To: <Sender> Subject: <Subject> Delivery has failed to these recipients or distribution lists: <recipient> Your message wasn't delivered because of security policies. Microsoft Exchange will not try to redeliver this message for you. Please provide the following diagnostic text to your system administrator. _____ Sent by Microsoft Exchange Server 2007 Diagnostic information for administrators: Generating server: <Server> <recipient> #550 5.7.1 Delivery not authorized, message refused ## Original message headers: