If you are looking for the best method to convert PST to MBOX, then you can use the EmailProHelp PST Migration Tool. It migrates PST File emails to PST, MBOX, EML, EMLX, and MSG file formats. It also imports Outlook PST to Office 365, Gmail, Yahoo, Thunderbird, AOL, Hotmail, Zoho, IMAP, Yandex, and iCloud. This tool also backup PST Files to PDF, CSV, GIF, JPG, TIFF, HTML, MHTML, PNG, DOC, DOCX, DOCM, VCF, and ICS. Moreover, it includes several features like converting multiple files together, removal of duplicate emails, and high PST file compatibility. It supports all versions of Windows OS.

Also Read: https://www.emailprohelp.com/pst-migration-tool.html