If you want to drag your offline email files from heavily corrupted email files then you can use perfect OST to PST Converter which is s converter software which can easily converts OST file into PST format and converted data export into latest PST file in preferred location. It completely fix Exchange Outlook OST file mailbox with you can as well as open OST mailbox data into Outlook formats with multiple formats PST,EML,MSG and HTML file formats.It also support all MS Outlook 2003, 2007, 2010, 2013, 2016.
So check out this link : http://www.softmagnat.com/ost-to-pst-converter.html