If you are aware of "Converting PST to MBOX Format," I'd like to suggest a website. You should try to find out where you can learn the best way to do so eSoftTools PST to MBOX Converter Software. It works with a very simple and clean graphical interface to make it easy to use and understand PST to MBOX file conversion for non-technical users. Both are accepted ANSI and UNICODE PST files for conversion. Both new and old versions of Microsoft Outlook are supported by the program. All customers of PST to MBOX Converter can use the free demo to easily move up to 25 emails from each folder without having to pay anything.
Click here:- Convert PST File to MBOX Format