get https://sandbox.datamotion.com/SecureMessagingApi/Message//NoAttachmentData
This method retrieves a message with attachment metadata but not the attachment contents based on the message ID passed. A session key must be submitted via the X-Session-Key header. The request body should be left empty. The message ID of the message you'd like to retrieve must be passed in the URL of this method. A successful transaction will receive a 200 status code.