post https://sandbox.datamotion.com/SecureMessagingApi/Message/GetMessageSummaries
This method is used to retrieve message summaries of all messages within a specified folder.
A session key must be submitted via the X-Session-Key header.
Include the LastMessageIdReceived request body parameter to specify the last message ID received to receive summaries only for messages created since the ID reference.
A successful transaction will receive a 200 status code.