You can import OST files to Yahoo Mail quickly with the Advik OST to Yahoo Import Tool. Manual methods are time-consuming and often lead to data loss, but this tool makes the process simple and safe. It works without Outlook and supports both healthy and corrupted OST files.

Steps to Import OST into Yahoo Mail:

Install and launch Advik OST to Yahoo Import Tool.

Add your OST file(s) into the software.

Enter your Yahoo login details (use an app password if you have two-factor authentication enabled).

Choose mailbox folders or apply filters (like date-range or selective emails).

Click Start Import to begin.