If a sender requests a delivery receipt in an e-mail message, a delivery status notification (DSN) message is returned that has a blank subject in the body even though the original message contains a subject in Exchange Server 2007 Service Pack 1

In an Exchange Server 2007 Service Pack 1 (SP1) environment, you create a routing agent that calls the GetMimeWriteStream method and sets the content of the MIME stream after the agent runs some logic on the whole MIME stream. In this scenario, if a sender requests a delivery receipt in an e-mail message, a delivery status notification (DSN) message is returned that has a blank subject in the body even though the original message contains a subject. However, typically, the body of the DSN should contain a list of the recipients and the subject of the original message.

To resolve this problem, install Update Rollup 9 for Exchange 2007 Service Pack 1. For more information about Update Rollup 9 for Exchange Server 2007 Service Pack 1, see the following Exchange Help topic: For more information about how to obtain the latest Exchange service pack or update rollup, see the following Exchange Help topic:

For more information about the GetMimeWriteStream method, visit the following Microsoft Web site:
http://msdn.microsoft.com/en-us/library/microsoft.exchange.data.transport.mailitem.getmimewritestream.aspx (http://msdn.microsoft.com/en-us/library/microsoft.exchange.data.transport.mailitem.getmimewritestream.aspx)

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