Microsoft KB Archive/159162

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

Article ID: 159162

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
 * Microsoft Mail for PC Networks 3.0
 * Microsoft Mail for PC Networks 3.2
 * Microsoft Mail for PC Networks 3.2a
 * Microsoft Mail for PC Networks 3.5

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This article was previously published under Q159162



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

A mail message sent with a read-receipt request from Microsoft Exchange Client to a Microsoft Mail user across a different organization results 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 Server in the MDBEF format when they arrive in Exchange Server. However, when going to another Exchange Server organization, these commands 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
To work around this problem:
 * Have all the computers running Exchange Server in the same organization.

This will ensure that the MDBEF is preserved and the read receipt maintains its proper format.

Additional query words: rr msmail p2 ia5

Keywords: kbprb KB159162

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