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…...Note.SMIME.MultipartSigned 0 Categories:...Schedule.Meeting.Request > IPM.Note.SMIME.MultipartSigned source:...