Exchange Server 2003 sends an incorrectly formatted URL to the event sinks when it receives messages from Exchange Server 5.5

When a Microsoft Exchange Server 2003 computer receives messages from a computer that is running Microsoft Exchange Server 5.5, the Exchange Server 2003 computer passes an incorrect URL to the Exchange Server 2003 event sinks. This problem occurs when Exchange Server 2003 receives messages through one or more of the following connectors:

• X.400 connectors
• SMTP connectors
• Routing group connectors

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

When Exchange Server 2003 receives a message from Exchange Server 5.5, the URL that it passes to the event sinks is supposed to reference the actual e-mail message in the Exchange information store messaging database (MDB). However, this URL is incorrectly formatted, and therefore it may appear similar to the following: This URL is incorrect for both of the following reasons:

• The path of the e-mail message is incorrect. The "MAILBOX/NON_IPM_SUBTREE/MTS-OUT" part of the path must be just "Inbox."
• The message subject appears two times. "MessageSubject.EML" must appear only one time.

A correctly formatted URL appears similar to the following: