rediSend supports numerous versions of Windows operating system, including Windows NT4, 2000 Server, 2000 Professional, 2003 / 2008 Server, XP Professional, XP Home, Vista, 7, 8, 10. Additionally ActiveFax or Microsoft Fax must be installed, configured and running on the machine on which rediSend is installed. rediSend installation requires a minimum of 60 MB of free hard drive space.