If you've been looking for the most efficient way to "Convert PST File into MBOX," eSoftTools PST to MBOX Converter Software is a great option. It contains a variety of quick, fast, and gentle acts. Email properties are preserved during the PST to MBOX conversion. Every mailbox item, including emails, contacts, calendar, attachments, tasks, notes, and more, can be converted from PST to MBOX using this software. Both customers have access to a free trial version of the software. You can convert up to 25 email items per folder per conversion in the trial edition.