How to turn email files in PST formats to MBOX?

You can use Thunderbird and Outlook to convert PST files to MBOX but I would not recommend that, because manual methods to convert PST to MBOX often result in complications. These methods can not convert PST files in bulk or apply any filters. On the other hand automated tools like DRS PST to MBOX Converter make it easier to Convert PST to MBOX and many other file formats like MSG, EML, MBOX, CSV, HTML, etc. Not only that this particular tool can migrate your PST files to different email clients as well. It can migrate PST files to Gmail, Office 365, AOL Mail, Yahoo, Thunderbird, Opera Mail, etc. In this tool, you can apply filters to avoid attachments from the conversion or to convert emails from a specific date range only. You can try a limited version of this tool for free. it is compatible with all versions of Windows and MacOS.