Knowledgebase: Mail Clients and Servers
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Why am I seeing delivery failures with my Exchange Server, but I can see the messages were delivered?
Posted by David Rutherford on 12 August 2013 01:10 PM
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I'm seeing messages saying "Delivery has failed to these recipients or distribution lists: A communication failure occurred during the delivery of this message. Microsoft Exchange will not try to redeliver this message for you. Please try re-sending this message later, or provide the following diagnostic text to your system administrator." The message says delivery failed for all the recipients but when I check I see some of them were delivered! What's going on here? The problem lies with how your Exchange environment deals with SMTP error messages. We can't say for certain, but we believe it has to do with the structural complexity of e-mail and how that structure changes as e-mail moves from server to server. Your Exchange server may be assigning a single "delivery status" for each message, when in fact e-mail is much more complex than that. You can have multiple delivery results for a single message with multiple recipients. In fact you can see this in the details of the status message Exchange generates; it looks like it wants to say the "message" failed (reporting all recipients as failed) when in reality it could be a single address that fails. It may be an Exchange configuration error, or there may be a problem with the Exchange software. Make sure your exchange server is fully patched. If the problem persists you may need to seek the advice of a Microsoft Exchange expert or contact Microsoft for further support. Keywords: microsoft, exchange, dsn, delivery, failure, recipients, errors | |
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