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Event ID: 4121 Source: MSExchangeIMC

Source
Level
Description
An error occurred while retrieving the destination address(es) for a message to be delivered. Since the destination of the mail is not known, the mail cannot be delivered. The message that was being processed has been moved to the "BAD" folder. Use the appropriate utilities found in the SUPPORT directory of your Exchange CD to view and manipulate these messages.
Comments
 
This event is similar to event ID 4122 same source. See ME242320.

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