If you are one of them who want to convert their database from Outlook PST to MBOX format with email attachments then, go and use perfect Solution KDETools PST to MBOX Converter Software that can convert PST file to MBOX file with all attachments. The tool is well capable to Export all email data from PST to MBOX included Inbox, Subfolders, Outbox, Sent Items, Deleted Items, Folders, and etc.
This tool easily converts Outlook PST file to Multiple file formats such as EMLX, MSG, PDF, HTML, and so many others. The PST Converter Split Large/Oversize PST file by Size, Date, Folders into MBOX format. You can also try free of cost DEMO version of the PST tool to recover 30 items per folders.
Read for more details:- http://www.pst-converter.com/