All, 6 CAS/HUB servers, CAS Array, hardware load balanced, 6 mailbox servers in a DAG. We mirror the LUNS for the logs and queue on the CAS/HUB servers. I was asked by a manager if it was possible to lose a piece of mail in our design. So for instance if a message reached a HUB server, and the server crashed (say a complete loss...) before the message could be sent to a `mailbox server, is that message lost irretrievably? Will the originating mail server in this case receive an NDR?
Thanks in advance, Peter
