Check PassFixer OST to PST Converter Software. It’s a very advanced OST file conversion tool. You can easily convert Outlook OST file to Yahoo and various formats such as EML, HTML, Yahoo, Gmail, Office 365, EMLX, MSG, ICS, MBOX, vCard, and Zimbra. Bulk conversion and email filtering feature helps you to convert Outlook OST file fastly. For more information check the free demo version of this tool from the official website of PassFixer.
Read more- Convert Outlook OST file to Yahoo