MBOX stands for Mailbox which is used to store email messages created by Thunderbird, Apple Mail and other email clients. But, sometimes there is a possibility it gets corrupted due to which user is unable to open MBOX file. To fix such issues, the SysInfoTools MBOX File Viewer software is there. This tool is particularly designed to deal with such kind of problems so that any user can easily open and view particular MBOX file. In the situation where you are stuck in between how to view MBOX files in any email client which supports MBOX, at that time you can go for this software which easily resolves such problems. This MBOX viewer supports almost all type of prominent email client software like Thunderbird, Apple Mail, and Netscape etc. Also, you can preview other important mailbox items like inbox, outbox, drafts etc. The most exciting thing is that it is totally free to use. It has three types of scanning modes which are available. The Standard mode is for the minor corruption, the Advanced mode is for moderate corruption, and the Deep mode is for severe corruption. These modes counter any level of corruption so that you can save your valuable time.