To convert a PST file into MBOX format, you can utilize the Regain PST to MBOX Converter Tool. This software streamlines the conversion process, allowing you to seamlessly transfer your Outlook data to the MBOX format. The Regain tool is designed to be user-friendly, providing a straightforward solution for users looking to migrate their email data. With its efficient features, it ensures a smooth and accurate conversion, preserving the integrity of your emails and attachments. Simply follow the intuitive steps provided by the tool, and you'll have your PST file transformed into MBOX format in no time. This can be particularly useful for users who need to switch between email clients or platforms that support the MBOX format.