You will need to search for the MessageClass property (PR_MESSAGE_CLASS in Extended MAPI) being "IPM.Note.SMIME.MultipartSigned" or "IPM.Note.SMIME".
Dmitry Streblechenko (MVP) http://www.dimastr.com/ OutlookSpy - Outlook, CDO and MAPI Developer Tool
<Happy.Cerberus[ at ]gmail.com> wrote in message news:1138546841.133846.213910[ at ]o13g2000cwo.googlegroups.com...
[Quoted Text] > I'm searching for a way to detect if the mail is signed/encrypted. > > The only idea i have is to search for multipart/signed and > multipart/encrypted content type, but MAPI doesn't seem to implement > content-type. >
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