eSoftTools PST TO MBOX Converter is a perfect choice if you're looking for the most efficient way to "How to Convert PST File into MBOX." There are many quick, fast, and gentle acts in it. During the PST to MBOX conversion, email properties are minted. The software can convert PST to MBOX along with every mailbox item such as - emails, contacts, calendar, attachments, tasks, notes, and more Both customers have access to a downloadable version that can be downloaded at no cost. In the sample edition, you can convert up to 25 email items per folder per conversion.