I have a client that is sending large amounts of email as sort of a mass mailer. I have finally convinced them to switch to a service designed for such mailings but they are asking questions I don't have the answer for so I'm turning to you all.
Here is the scenario. I have Exchange 2007 and smarthost email through Postini. My client sends a batch of emails to 100 or so recipientsin the BCC field. They usually send 4 or 5 batches each night using the Outlook schedule feature. They are getting a large amount of message expired NDRs. I have set the queue to expire in 12 hours instead of 2 but the results are the same. So how does the mail flow actually work?
1.When Outlook submitts to Exchange does it immediately get routed as a single message to my smarthost and then the smarhost breaks out each recipient?
2. What happens when the first problematic message is reached? Does it reinject all messages back into the exchange queue for retry? And does that message retry until the queue expires preventing all other BCC recipients from being deliver?
I just need a better understanding so I can intelligently answer their why doesn't this work question. Thanks.
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