A loop has been detected in the message being transferred in. A non-delivery report was generated with reason code and diagnostic code . [ ] (14)

Details
Product: Exchange
Event ID: 201
Source: MSExchangeMTA
Version: 6.5.6940.0
Component: Microsoft Exchange Message Transfer Agent
Message: A loop has been detected in the message <text> being transferred in. A non-delivery report was generated with reason code <error code> and diagnostic code <error code>. [<value> <value> <value> <value>] (14)
   
Explanation

A loop was detected in the message being transferred in. A non-delivery report (NDR) was generated.

   
User Action

The problem may be the existence of a redundant route located in the Intermediary or Hub Site within the path to the destination site. Examine your routing tables on all of your Exchange servers, particularly those running Exchange 5.5 and older. Use message tracking to help locate the problem.

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