Exchange 2003: Mail queuing in Deferred Delivery (924239)


The information in this article applies to:

  • Microsoft Exchange Server 2003 Enterprise Edition
  • Microsoft Exchange Server 2003 Standard Edition
Source: Microsoft Support

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SYMPTOMS

Mail from external sources will queue in the Deferred Delivery Queue.

CAUSE

This can be caused by a loop to an external smart host. If mail comes in for a non-authoritative email domain, and relaying is allowed, the mail will try to route back out to the Internet if the recipient does not exist in the org. If the mail is sent to a smart host that is configured to forward mail to that email domain back into the Exchange Organization, then we will get a loop. The mail will queue in deferred delivery until the loop is removed.

RESOLUTION

To resolve this type of issue add the email domain to the recipient policy, or restrict relaying to force NDR's to be sent properly.

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Modification Type:MinorLast Reviewed:10/6/2006
Keywords:kbprb kbtshoot kbrapidpub KB924239 kbAudITPRO
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