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Event ID: 3009 Source: MSExchangeTransport

A non-delivery report with a status code of 5.1.0 was generated for recipient <recipient>.
Cause: This is categorizer failure caused by a bad address.
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Solution: Either the recipient address is incorrectly formatted or the categorizer was not able to properly resolve the recipient. Checking the recipient address and re-sending the message is the first step to resolving this error.
This event occurs when you enable the envelope journaling feature in Microsoft Exchange Server 2003 Service Pack 2 because the envelope journaling feature uses the domain controller instead of the global catalog server to resolve the journaling mailbox GUID to the domain name of the user account. This process occurs when the e-mail message is re-categorized and then is journaled again. See ME925379 for a hotfix applicable to Microsoft Exchange Server 2003.

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