I have developed an exchange client for Outlook '97 to digitally sign (and
encrypt) outgoing messages. However, when my encrypted messages are
received by Outlook '98 / Outlook Express, they are not recognised as being
digitally signed because the MIME header content type dose not indicate that
the message has being signed.
E.g. The PR_SECURITY property (requesting additional security for the
message) can be set SECURITY_SIGNED or ECURITY_ENCRYPTED. However, there are
a few more properties (to many to include here.) How do I set the content
properties / Message options to indicate that the message is digitally
You help will be very much appreciated.