Many software products are available in the market, but the user should opt for safe software, so I will suggest KDETools PST Converter software. This converter can convert the PST files to multiple formats like EMLX, MSG, PDF, HTML, etc. Exports emails from PST to MBOX format without losing any data. It supports all Windows versions like 10, 8, 7, XP.
VISIT HERE: http://www.pst-converter.com/