The best method to export emails from Yahoo to MBOX file is by using a professional solution like the Advik Yahoo Backup Tool. Yahoo Mail does not offer a built-in option to download emails in MBOX format, making manual methods complex and time-consuming. The tool provides a direct and secure way to export Yahoo emails to MBOX while maintaining folder structure, email headers, and attachments. It also supports selective export and bulk backup, ensuring fast processing and complete data integrity, which makes it the most reliable method to export Yahoo Mail to MBOX files.