Drag and drop message to export to os folders

Ability to export individual or selected messages by dragging and dropping them directly from Mailbird to windows (Operating System) folders open on a separate window.
Files should be created in a native email format that can be associated with Mailbird application so that later on if user or clicks on one of this files the O. S. will call the Mailbird application to open the file and display it to the user in a native format with all the functionality of Mailbird.