I will share my experience with you about the SoftMails software. It can accurately repair your damaged or corrupted OST file and it can import your outlook OST file to PST, HTML, MBOX, vCard, Yahoo, Gmail, Zimbra, EML, Office365 formats. In this software, you can maintain all original properties of email like to, bcc, cc, subject, time, date, from, data, etc, and maintain all other properties without any modifications. It is virus-free software. It provides you with the demo version for users' satisfaction.