Microsoft KB Archive/160564

= XFOR: MSMail Read-Receipts Missing Data Across Organizations =

Article ID: 160564

Article Last Modified on 10/28/2006

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APPLIES TO


 * Microsoft Exchange Server 4.0 Standard Edition
 * Microsoft Exchange Server 5.0 Standard Edition
 * Microsoft Exchange Server 5.5 Standard Edition

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This article was previously published under Q160564



SYMPTOMS
When you send a mail message from a Microsoft Mail 3.x client to a Microsoft Exchange user in a different organization with a read-receipt request, the result is a read-receipt returned that is missing the To and Subject fields.

Also, mail sent from Microsoft Exchange to a Microsoft Mail user across a different organization with a read-receipt request will result in the following returned receipt:

  Your message

To:  Unknown Subject: Unknown Sent: Unknown

was read on 11/8/96 8:36:00 AM.



CAUSE
The Microsoft Mail client generates and responds to Read Receipts using MAPI commands. These commands are encapsulated by Exchange in the MDBEF format when they arrive in Exchange. However, when going to another Exchange organization, they are converted to a native X.400 format, and the MDBEF properties are stripped out.

The Microsoft Mail client cannot compensate for this X.400 limitation, because it does not know how to properly encode the message using standard X.400 flags for the handling of read receipts.



RESOLUTION
The only current workaround for this Microsoft Mail client limitation is to include all of the computers in the same organization running Microsoft Exchange Server so that the MDBEF can be preserved and the read receipt will maintain its proper format.

Additional query words: rr msmail windows client x400 p2 ia5 org

Keywords: kbprb kbusage KB160564

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