If you want to choose the right way to move PST file to MBOX, I personally recommend you to use KDETools PST to MBOX Converter software. This software also supports batch conversion to convert multiple files with one click. Easily convert all email items like email, contacts, calendar, task, diary, etc. It is compatible with MS Outlook 2019, 2016, 2013, 2010, 2007 versions for Windows.

READ MORE INFORMATION:  https://www.kdetools.com/pst/mbox/