OS X Mail Client Backup Solution It is not strange that a lot of people worldwide are choosing Mail Backup X as their Apple Mail backup utility of choice. The main reason why this is so is that this software is a universal email backup application that allows people to preserve their data files easily and much quicker. Not only is the Mail Backup X tool accurate for data preservation but it also provides a well organized and professional view of all emails through the Mail viewer window. When users want to read emails from the backups and not necessarily restore, they can easily view and read all data content whenever they need.