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....Load the EML file var eml = MailMessage . Load ( "file.eml" , loadOptions...the EMLX file var emlx = MailMessage . Load ( "file.emlx" , loadOptions...