OST to MBOX Software is 100% best application which supports both corrupted and healthy Offline OST file to convert their data included emails, contacts, calendars and appointments with attachments into MBOX file that can easily open in different mail clients such as- AppleMail, Thunderbird, Entourage, Eudora, Spicebird, PocoMail, Evolution, SeaMonkey, Netscape, Opera and many more.