Are there any existing methods to add X-Field or MESSAGE-ID to the messageHeader of the SmtpConnection class. I have looked into "buildMessageHeader" method on this class and this is what I am after and I have got it working within this method, however if I updated CardSchema I would obviously lose this. Does anyone know of an easy way to implement this?
E.g.
x_part := "Message-ID:" & Space & LeftAngle & "000e0cd2538cag0f6104764609e4@DOMAIN.com" & RightAngle;
smtp.mAddToMessageHeader(x_part); //add the extra field to the header