How can I programmatically verify a signed outlook message is valid and trusted? RRS feed

  • Question

  • Hi,

    I'd like to find out whether a given signed message is valid and trusted - meaning it doesn't have a "Signed by: There are problems with the signature. Click the signature button for details."

    How can I do that?



    Monday, March 19, 2012 5:06 PM


  • Outlook Object Model or Extended MAPI expose no such information. You would need to programmatically process the p7m (or the raw MIME in case of clear signed) attachment.


    Redemption exposes encrypted messages through the RDOEncryptedMessage object ( and its SignatureValid property.

    The upcoming version of Redemption (5.3) features a completely reworked RDOEncryptedMessage implementation; let me know if you need a beta version.


    Dmitry Streblechenko (MVP)
    Redemption - what the Outlook
    Object Model should have been
    Version 5.2 is now available!

    Tuesday, March 20, 2012 6:54 AM