Microsoft KB Archive/268069

= OL: S/MIME Clear Text Signed Messages Are Invalidated When They Are Created by a Client Extension =

Article ID: 268069

Article Last Modified on 7/28/2006

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APPLIES TO


 * Microsoft Outlook 2002 Standard Edition
 * Microsoft Outlook 2000 Standard Edition
 * Microsoft Outlook 98 Standard Edition

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This article was previously published under Q268069



SYMPTOMS
If a Microsoft Outlook client extension creates a S/MIME message with a multipart or mixed body and sends the message as a clear text signed message (attaching the signature as a Smime.p7s file), the message appears as a &quot;tampered&quot; message by the receiver.



CAUSE
This problem occurs because the Internet Mail Transport (in both the Corporate Workgroup (CW) mode and the Internet Mail Only (IMO) mode) reparses and rewrites the body of the message even if it is valid.



RESOLUTION
This behavior is by design.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.



MORE INFORMATION
Keywords: kbbug kbfix KB268069

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