You receive an NDR message when you send an e-mail message by using an Exchange Server 2007 Edge server

You send an e-mail message by using a Microsoft Exchange Server 2007 Edge server. When you do this, you receive a non-delivery report (NDR) message that includes the following information: This problem occurs if the Attachment Filtering agent is enabled on the Exchange Server 2007 Edge Server and if the e-mail message contains any of the following:

• A compressed (.zip) file that is split into multiple files.
• A compressed (.zip) file that implements ZIP64 extensions.
• A Microsoft XML Paper Specification (.xps) file that is created with the .Net Framework.

To resolve this problem in Exchange Server 2007 Service Pack 1, install the latest update rollup for Exchange Server 2007 Service Pack 1. To resolve this problem in the release version of Exchange Server 2007, install Update Rollup 7 for Exchange Server 2007. For more information about Update Rollup 7 for Exchange Server 2007, see the following Exchange Help topic: For more information about how to install the latest Exchange service pack or update rollup, see the following Exchange Help topic: After you install the latest update rollup or service pack for Exchange 2007, you must add a new entry in the Edgetransport.exe.config XML file to enable the Attachment Filtering agent feature. To do this, follow these steps:

1. Stop the Transport service.
2. Locate the EdgeTransport.exe.config file. This file is located in the following path:
   drive:\Program Files\Microsoft\Exchange Server\Bin\
3. Add the following entry between the <appSettings> element and the </appSettings> element of the EdgeTransport.exe.config file:

   <add key="AllowInvalidAttachment" value="true" />

4. Restart the Transport service.
5. Verify that the problem is resolved. To do this, send an e-mail message that has a .zip file that is split into multiple files. Make sure that this e-mail message is processed for the upgraded server.

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

For more information, click the following article numbers to view the articles in the Microsoft Knowledge Base:
For more information about a similar issue in an Exchange Server 2010 environment, click the following article number to view the article in the Microsoft Knowledge Base: For more information about how to configure attachment filtering in Exchange Server 2007, visit the following Microsoft TechNet Web site: