Class Libraries & REST APIs for the developers to manipulate & process Files from Word, Excel, PowerPoint, Visio, PDF, CAD & several other categories in Web, Desktop or Mobile apps. Develop & deploy on Windows, Linux, MacOS & Android platforms.... MapiMessage mapi_msg = mapiMessage . fromMailMessage...MapiMessageFlags as UNSENT and FROMME mapi_message_flags = self . MapiMessageFlags...