The eSoftTools PST TO MBOX Converter is the best solution if you've been looking for the most efficient way to "Convert PST File into MBOX." It includes some short, rapid, and simple steps. During the PST to MBOX conversion, email properties and data integrity are preserved. This software can convert any mailbox object from PST to MBOX, including emails, contacts, calendars, attachments, tasks, notes, and more. A free download version of the product is available to both customers. You can convert up to 25 email items per folder in the trial edition for each conversion.