XADM: Information Store Stops Responding When IMAP Client Attempts to Retrieve S/MIME Message

When an Internet Message Access Protocol (IMAP) client tries to gain access to the information store, the information store may stop responding.

This issue can occur when you convert a digitally signed Secure/Multipurpose Internet Mail Extension (S/MIME) message that contains a corrupted body part to be delivered to a mail client that is Request for Comments (RFC) 822 compliant. Exchange Server may generate an access violation because of a NULL content pointer.

To resolve this problem, obtain the latest service pack for Exchange Server 5.5. For additional information, click the following article number to view the article in the Microsoft Knowledge Base: The following files are available for download from the Microsoft Download Center:
For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base: Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help to prevent any unauthorized changes to the file.

Microsoft has confirmed that this is a problem in Microsoft Exchange Server version 5.5. This problem was first corrected in Exchange Server 5.5 Service Pack 4.

After this fix is applied, when this error occurs:

• The following error code is returned:
  0x8004011B (MAPI_E_CORRUPT_DATA)
• The server logs the following message in the application event log:
  Event: 1300
  Source: MS Exchange IMAP4
  An error 0x8004011B occured while rendering a message for download on mailbox: DN_of_the_mailbox
• The client notifies the user that the message could not be downloaded.