How to Import MBOX to Webmail?

Jenny Lowrence | March 7th, 2025 | Email Migration

Summary: Nowadays, cloud based online webmail services have become the most suitable for the work environment. That’s why many users are looking for a solution to import MBOX to Webmail. This article explains two different ways to open MBOX file in Webmail account. Read the full blog to get detailed instructions and migrate MBOX file to Webmail easily.

MBOX is the most widely used file format to store email messages. It stores multiple emails in a single file. It is supported by various email clients such as Thunderbird, Apple Mail, Eudora, Postbox, and many more. On the other hand, Webmail is a web based email service that allows users to send, receive, and mange emails through a web browser. Users can access this email service from any browser with an internet connection.

However, emails stored in an MBOX file can be accessible only from its supported email applications. So, users can choose their MBOX import to Webmail to get rid of such problems. There are different ways to transfer MBOX file to Webmail account. Below, we will cover both manual and automated solutions one by one. You can choose any one that is most suitable for you. Let’s start without any further delay.

How to Open MBOX File in Webmail for Free?

You can manually import MBOX to Webmail via Thunderbird. So, let’s start with the step-by-step instructions.

1. Launch the Thunderbird email client on your system.

2. Click on Tools and choose the Account Settings option.

click on account settings

3. Go to Account Action and select Add a Mail Account.

select Add a Mail Account

4. Enter your Webmail login credentials and press Continue.

5. Thunderbird will automatically configure the Webmail IMAP settings.

6. After configuration, click Tools >> Add-Ons.

click Tools >> Add-Ons

7. Install ImportExportTools NG plugins and restart Thunderbird.

import mbox to webmail

8. Now, right-click on Local Folder and select ImportExportTools NG >> Import mbox file.

import mbox file

9. After that, select this MBOX file and click Copy To >> Webmail Account.

click Copy To >> Webmail Account

Done! That’s how you can manually upload MBOX file to Webmail account.

How to Transfer MBOX File to Webmail Automatically?

If you want an instant solution then try the Advik MBOX Converter on your system. The software can directly import MBOX to Webmail account in just 4 simple clicks. It has a dual mode that enables you to migrate single or multiple MBOX files in one go. It offers various advanced email filter options to import selected emails from MBOX file. The tool preserves all email attributes and mailbox folder hierarchy during the process.

Click on the below link to download it for FREE.

Steps to Import MBOX to Webmail

1. Run the tool and add .mbox file.

add mbox file

2. Choose the email folder you want to import and click Next.

Import MBOX to Webmail

3. Select IMAP as a saving option.

Select IMAP

4. Enter your Webmail account login details and click the Convert button.

enter webmail login details

The software will start importing emails from the MBOX file to your Webmail account. Once this is complete, open your Webmail account and check the transferred emails here.

Why Choose Automated Tool Instead of Manual Solution?

There are various advantages of using this tool which are given here;

  • Bulk Importing: With this tool, you can import multiple MBOX files in a single attempt. This feature saves your time and effort to import unlimited files.
  • Preserves Metadata Properties: The software preserves all email attributes such s sender/receiver info, attachments, hyperlinks, signatures, etc. while importing. Thus no data loss will take place at any step.
  • Maintains Folder Structure: This utility retains mailbox folder hierarchy throughout the process. You will get all email folders in their original format even after the process.
  • Advanced Email Filters: The software offers various advanced email filters for selective email importing. Using these filters, you can transfer selected emails from MBOX file based on date range, to, from, subject, etc.
  • No File Size Restrictions: There are no limitations on the size of the .mbox file. With this utility, you can upload large MBOX files with full accuracy.
  • Windows Supportive: You can run this application on any Windows-based system. It supports all the latest and old versions of the Windows operating system including Win 11.

Conclusion

In this post, we have discussed how to import MBOX to Webmail account. Here, we have mentioned both manual and automated solution to accomplish this task. You can easily migrate MBOX to Webmail using the Thunderbird email client but if you want an instant solution then you must try the above-suggested tool. The software can quickly upload MBOX to Webmail account without any external help. you can download its free demo version to check how it work so easily.