How to Import MBOX to Yahoo Mail?

Alora Eve | March 14th, 2026 | Import Emails

Are you looking for a solution to import MBOX to Yahoo Mail account? It can be difficult to find the right solution but you have come to the right place. We understand that you want control of your email data and if you want to access your email data in Yahoo Mail we will help you do that.

However, Yahoo Mail does not support MBOX files directly. So, in this article, we will discuss the best and top-rated solution to open MBOX file in Yahoo Mail with all email items & components.

Yahoo Mail does not have the native facility to import MBOX files to Yahoo mailbox, as discussed earlier. This means users can use Thunderbird or any other mail client that supports IMAP.

Here we will discuss the advantages and disadvantages of each method so that you can make a wise decision. Let’s start to successfully resolve your issue.

Why You Cannot Open MBOX Files in Yahoo Mail Directly?

MBOX is a mailbox storage format for desktop email clients. Yahoo Mail is an online email service that operates from cloud servers and IMAP synchronisation.

This is because Yahoo Mail does not have a direct option for “Import MBOX”. There are two ways to import MBOX emails to Yahoo Mail. You may use an email client like Thunderbird or a professional migration tool.

Why Import MBOX to Yahoo Mail?

There are many instances where users want to import MBOX emails into Yahoo Mail.

Get old backup e-mail: Many users still have old MBOX backup files of Thunderbird or Apple mail. Import them into Yahoo Mail so you can access them anywhere.

Switch to Yahoo Mail: Some users have migrated from desktop email clients to Yahoo Mail for the additional accessibility and online storage.

Login to Your Email Anywhere: Yahoo mail can be accessed on mobile phones, tablets and browsers. This makes email more accessible than with local MBOX files.

Better Email Management: Yahoo Mail offers features such as search filters, folders, spam protection and other management tools to properly organise emails.

Safe Cloud Backup: Keeping emails in Yahoo Mail also reduces the risk of losing important messages during a local system crash or accidental deletion.

How to Import MBOX File into Yahoo Mail?

Yahoo Mail does not support direct import of MBOX files but MBOX emails can be transferred manually. You can use Mozilla Thunderbird to transfer your MBOX emails to Yahoo Mail if you have it installed.

Follow the steps to import MBOX to Yahoo Mail account;

  1. Download and install Mozilla Thunderbird onto your pc.
  2. Open Thunderbird and create a new account if you haven’t set it up yet.
  3. Now, you need to import your MBOX file to Thunderbird.
  4. Open Thunderbird >> Click on Tools >> Add-ons and Themes
  5. Search for ImportExportTools NG and click Install.
  6. Restart Thunderbird to activate the add-on.
  7. Right click on Local Folders in Thunderbird.
  8. Choose ImportExportTools NG > Import MBOX file.
  9. Select “Import one or more MBOX files directly” and click OK.
  10. Navigate to and select your MBOX file and click Open.
  11. Your emails will now be visible in Thunderbird under Local Folders.
  12. Open Thunderbird and select Tools > Account Settings.
  13. Click Account Actions > Add Mail Account.
  14. Enter your Yahoo Mail email address and app password (not your normal password).
  15. Thunderbird will auto-detect the IMAP settings. Click Done to complete setup.
  16. Navigate to the Local Folders section where your MBOX emails are stored.
  17. Choose the emails you want to move.
  18. Select All : Ctrl + A (Windows), Cmd + A (Mac)
  19. Right-click and select Move To > Yahoo Mail > Inbox (or whichever folder you want).
  20. Thunderbird will now upload all the selected emails to your Yahoo Mail account.

And that’s it! So, you have successfully imported MBOX emails into Yahoo Mail free with the help of Thunderbird.

How to Transfer MBOX Emails to Yahoo Mail Automatically?

Try Advik MBOX Converter for Windows, it is super-fast and straightforward. Install the software, add your MBOX files, add your Yahoo Mail credentials and click “Convert”. This tool will import MBOX to Yahoo Mail with original folder structure, email formatting and attachments. It facilitates bulk migration, with which you can migrate multiple MBOX files at a time without any size limitations. It’s easy, safe & simple way to import MBOX emails to Yahoo Mail.

 

Important Note: It requires you to generate Yahoo Mail app password.

Steps to Import MBOX into Yahoo Mail

Step 1. Run the software and add MBOX Files.

Run MBOX to Yahoo Mail import tool

Step 2. Choose the required email folders.

Choose emails to import into yahoo

Step 3. Select Yahoo as a saving option from the list.

Select Yahoo as a saving option

Step 4. Enter Yahoo Mail login credentials and click the Convert.

click convert to import mbox to yahoo

Once the process is completed, log in to your Yahoo Mail account to check all the transferred emails there.

Done! You have successfully imported your MBOX file into Yahoo Mail without any manual effort.

Watch How to Import MBOX to Yahoo Mail Directly

Benefits of Using a Professional Approach

  • Simple & Easy to Use: This tool provides a simple and direct way to transfer your entire mailbox to Yahoo Mail. You just need to add the MBOX files, enter your Yahoo email ID and password, and start the process. Once the transfer is complete, you can check all your emails in your Yahoo account.
  • Batch Import MBOX Files: With this tool, you don’t have to move emails one by one. It offers a bulk transfer option, allowing you to import multiple MBOX files into Yahoo Mail in a single process. There are no file size limits, ensuring a smooth and hassle-free migration.
  • Keeps Your Folder Structure Intact: The tool ensures that your email folders remain organized exactly as they were in the MBOX file. This means you won’t lose track of important emails, and all your data will stay in its original structure, including metadata and attachments.
  • Safe and Reliable: This software is completely secure, protecting your emails from data loss, corruption, or security risks. It does not store or modify any of your data, ensuring a safe and accurate email transfer. Experts have tested it for reliability, making it a trusted choice for MBOX to Yahoo migration.
  • 24/7 Customer Support: If you face any issues or have questions, our support team is available 24/7 to assist you. You can contact us via email or live chat, and we’ll be happy to help you with any concerns. Our goal is to provide a seamless experience for all users.

Conclusion

So, we are done with providing some easy ways to import MBOX to Yahoo Mail. You also understand now that transferring MBOX emails to Yahoo Mail is not as easy as it involves multiple lengthy steps. If you want a quick and direct solution, using a professional solution like Advik Software is the best option. Try the method that suits you best and easily open MBOX file in Yahoo Mail account.

Commonly Asked Questions

Q1. Is there a way to import only selected emails from an MBOX file?

Ans. Manual methods do not provide direct filtering options. Users usually need to manually select emails or folders before uploading them to Yahoo Mail.

Q2. Why are some folders missing after transferring MBOX into Yahoo Mail?

Ans. Manual import methods do not always recreate the original folder structure automatically. Users may need to manually create folders in Yahoo Mail and move emails accordingly.

Q3. Can I continue using Yahoo Mail while MBOX emails are importing?

Ans. Yes, Yahoo Mail remains accessible during the import process. However, newly imported emails may not appear immediately until the sync finishes.