Instructs the class to include the headers in the MessageText and LocalFile.
This property instructs the component to include the headers in the MessageText and LocalFile. If set to true, the headers for the message you are retrieving will be placed before the message body in the MessageText property;. If LocalFile is set, then the headers will be written to that file before the message body. In this manner, the whole content of a MIME-encoded message can be passed to the MIME class for further message processing.