The easiest way to open an MBOX file in Windows is by using a dedicated MBOX Viewer. You don't need to configure an email account or import your mailbox into another email application. MailsDaddy Free MBOX Viewer allows you to access your mailbox data without going through the hassle of importing files into Thunderbird or configuring an email account. You can browse stored messages, check email details, and view attachments directly through the software. It's a handy solution for anyone who wants to access old email backups or exported MBOX files quickly and easily.

Tool Link: https://www.mailsdaddy.com/free-mbox-viewer/