I recommend eSoftTools PST to MBOX Converter Software if you want to learn more about "PST to Thunderbird without Outlook." Is it that simple and seamless in terms of performance? It shows a live preview of the PST file components before starting the conversion process. We're here to help you out. All customers can use the free trial edition, which converts 25 email items per folder.
Read more:- https://www.esofttools.com/pst-to-mbox-converter.html