If you guys want to PST File Conversion into MBOX file format. DRS Softech  PST Converter Tool. It is the best tool for conversion into Multiple file formats such as EML, MBOX, PDF, EMLX, HTML, MSG, VCF, etc. It allows users to Migrate Outlook PST data into  Gmail, Yahoo, Opera Mail, Thunderbird, IMAP, Hotmail, etc. with the working demonstration. Users don't need to install MS Outlook on their PCs. It can Import PST to Google Workspace. and Preview the complete mailbox folders, subfolders, and attachments. PST Converter works effectively with all versions of the Windows OS.