If you want to best PST to MBOX Converter free download application, then you will have to configure the PST on your computer first. PST to MBOX Converter for Windows is a simple way to download and convert PST to an MBOX application without any error. PST to MBOX Conversion application is to export PST file properties - including emails, to-do lists, journals, and notes, to MBOX format. This software supports all Outlook and Windows OS versions. Users may also make use of the application's free trial edition to learn more about the features and capabilities of the program. Refer:
https://www.sametools.com/convert/pst/