The best solution is the eSoftTools PST to MBOX Converter Software, which is available for free. Exporting Outlook emails to MBOX format for later use is straightforward with the PST to MBOX Converter program. There are only a few steps left in this process. PST files can be converted to ANSI or UNICODE formats. Both Microsoft Outlook 2007 and older versions are supported by the software. The tool will be used by customers with little or no technical knowledge. You can move 25 emails from each folder during the free trial.
Get more information:- PST to Thunderbird Converter
