XCON: Read Receipts Looping in the Message Transfer Agent

ID: Q176127

The information in this article applies to:

Microsoft Exchange Server, version 5.0

SYMPTOMS

When a message is sent to an Enterprise Solutions Limited recipient with a read receipt request, the read receipt is received by the originating message transfer agent (MTA), but is seen looping within the MTA when it is routed to the user. Event logs indicate the following loop detection event:


   Source: MSExchangeMTA
   Event: 201
   Description: A loop has been detected in the message being transferred
   in. A non-delivery report was generated with reason code unable-to-
   transfer and diagnostic code loop-detected. [MTA XFER-IN 17 104] (14)

A non-delivery report (NDR) event in the form of Event ID 290 is also generated in the event logs.

STATUS

Microsoft has confirmed this to be a problem in Microsoft Exchange Server version 5.0. This problem has been corrected in the latest U.S. Service Pack for Microsoft Exchange Server version 5.0. For information on obtaining the Service Pack, query on the following word in the Microsoft Knowledge Base (without the spaces):

S E R V P A C K

Keywords : kbbug5.00 kbfix5.00.sp2 XCON
Version : WINDOWS:5.0
Platform : WINDOWS
Issue type : kbbug