ComposeMessagePart ignores encoding and disposition parameters
I have a problem with sending a message made of several parts (attachments). I can successfully upload an attachment and also create the relevant message to send but the sent message ignores both the encoding I specify (7bit) and the disposition (INLINE) for the attachments.
If instead of uploading the attachment I'm just specifying it as the data to the ComposeMessagePart I cannot specify the desired content type ("application/octet-stream").
Not sure how to proceed here as I receive no error.