If you are finding a way to convert PST into MBOX then you should try eSoftTools PST TO MBOX Converter and It has so many simple, easy, and gentle actions. During the PST to MBOX conversion, email properties are maintained. To convert required emails from a PST file, the user simply needs to select the mail filtering option and choose the from and to dates. Besides new customers, the demo version is also available for all customers in the demo version you can convert 25 email items per folder without any fare.
Read more:- https://www.esofttools.com/pst-to-mbox-converter.html