Hello,
FYI:
Dim MyMapiMessage As MapiMessage = MapiMessage.Load(str, loadopt)
MyMapiMessage.Headers.Set("X-Mailer"...
Dim SignedMessage As MapiMessage = New EMail.SecureEMailManager().AttachSignature(MyMapiMessage, MyC…...Microsoft Outlook is strictly a mail-only, transport-level feature...Appointments, or Meeting items.Only mail messages (IPM.Note) can be digitally...