Forefront Security for Exchange Server incorrectly detects the Winmail.dat file as a CorruptedCompressedFile virus

When the Winmail.dat file contains multiple image files that are embedded, Microsoft Forefront Security for Exchange Server incorrectly detects the Winmail.dat file as a CorruptedCompressedFile virus.

To resolve this problem, you must install Hotfix Rollup 3 for Microsoft Forefront Security for Exchange Server Service Pack 1. For more information, click the following article number to view the article in the Microsoft Knowledge Base: Note Forefront Security for Exchange Server Service Pack 1 must be installed before you install this hotfix rollup.

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