Front-End and Back-End, Non-delivery Report
Exchange server: Lou is the front-end server.
Exchange Server: Sam is the back-end server.
Lou supports the OWA connection. Lou is configured as a relay for all incoming and outgoing SMTP messages.
The company uses the data.com for all SMTP addresses.
Users report that when e-mail (destined to Internet) cannot be delivered, they don't receive the Non-delivery reports (NDRs).
The reason is that the NDR generated at Lou is not relayed to Sam.
Solution:
Create a SMTP connector with the namespace of data.com and specify the Sam as a smart host.
