For backup emails from Windows Mail App to PST, you must try WLM to PST Converter. It will help you in quick conversion process. Users can backup emails from Windows Mail App to PST with ease. The Software put no limitations on file size, and users can apply advance filter options for selective conversion. You get result in its original form with all of its attachments. And to backup emails from Windows Mail App to PST users can opt their desired location to save the output.