The remote path on the FTP server where MDN's are sent or received.
In the Send adapter, the MDNPath determines what directory incoming MDN receipts are read from.
In the Receive adapter, the MDNPath determines what directory MDN receipts are sent to.
You can set it to either an absolute directory path or a path relative to the initial remote directory when the adapter connects to the FTP server.
This property is not available in the Sender.