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Event ID: 3013 Source: MSExchangeTransport

Level
Description
A non-delivery report with a status code of 5.2.1 was generated for recipient <recipient>.
Comments
 
This problem occurs if the following conditions are true:
1.You have more than one domain in your Active Directory forest.
2.You are running Microsoft Windows Server 2003 Service Pack 1 (SP1) on the domain controllers in your domains.
3.The users who cannot send e-mail messages to any public folders are members of the built-in Distributed COM Users security group.
See ME873393 for a hotfix applicable to Microsoft Exchange Server 2003.

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