I recommend using the Softaken PST to MBOX Converter if you want to safely convert your Outlook PST files into MBOX files without losing any data or attachments. You may easily convert your Outlook Mailbox files into MBOX files in bulk with this application. Its clever features and easy-to-use interface make the converting process safer and more effective. The program works with both ANSI and Unicode versions of Microsoft Outlook. All versions of Windows, including Windows 11, 10, 8.1, 7, Vista, XP, 2000, and so on, are compatible with it. A trial version of this software is available.