How do I convert Outlook PST to MBOX?

How do I convert Outlook PST to MBOX? The easiest way is to export your PST data from Outlook and then import it into an MBOX-supported email client. First, open Outlook and confirm your emails, contacts, and folders are stored in the PST file. Next, choose a method: use an email client like Thunderbird (via an import/export add-on) or use a dedicated PST to MBOX converter tool if you want a faster, more accurate transfer with folder structure intact. Most professional tools let you convert multiple PST files in bulk, keep attachments, and preserve metadata like To/From, subject, and timestamps. After conversion, open the MBOX file in Thunderbird, Apple Mail, or another compatible client to verify emails and attachments. Always back up the PST before starting.