Easy Approaches for Importing MBOX File into Thunderbird Account

I have some MBOX files on my Desktop. Now I decided to move these files into my new Thunderbird account. But I don’t have any idea of how to open .mbox emails in Mozilla Thunderbird account. Is there any easy solution for importing MBOX file into Thunderbird?

Are you also looking for the methods to add MBOX mail in Thunderbird? Then, from here you will get the correct solution for your question. In this article, we will be discussing the manual way to view MBOX mail in Thunderbird & expert technique of how to import MBOX files to Thunderbird in a hassle-free way. By using this techniques you can convert MBOX mails to Thunderbird account without losing any of the files.

Need of Add MBOX to Thunderbird

If the user have currently transferred email files to MBOX formats, he/she will need to move MBOX files to Thunderbird. To open MBOX files in Mozilla Thunderbird, the user needs an application. That is why we are providing the manual and expert techniques for the process to our clients.

About Mozilla Thunderbird

We know that Thunderbird is a popular free desktop email client. It is an open source and cross-platform email client which provides a variety of emailing option for their clients. Thunderbird uses .mbox extension for storing data and the data is stored in user-defined default storage. For a single file, it uses .eml file extension. Other than Thunderbird, MBOX files can be supported by different email clients like Eudora, Mac Mail, Opera Mail, SpiceBird, Entourage etc.

 Manual Method for Importing MBOX File into Thunderbird

The “ImportExportTool” is an add-on that is provided by Mozilla for Thunderbird to perform multiple tasks. To add MBOX to Thunderbird using the manual method, you have to install the “ImportExportTool” in your Thunderbird account. By using this method you can open MBOX mail in Thunderbird.

Steps to View MBOX File in Thunderbird

Here, we are providing you the steps to move MBOX mail in Thunderbird using “ImportExportTool”. You just have to follow the ways and open MBOX files.

Launch Mozilla Thunderbird email client application to start the process of importing MBOX file into Thunderbird.

Launch Mozilla Thunderbird
Click on Tools – ImportExportTool – Import MBOX file to view MBOX to Thunderbird.

Import MBOX file

After this, we will get a “file MBOX import” wizard window. In this window, select “Import directly one or more MBOX files” option to open MBOX files. You can check other options also. After selection, click on “OK” button to view MBOX mail in Thunderbird.

MBOX mail in Thunderbird

After that, a window will be poped-up to select the MBOX file on move. Then choose the files and click “Open”. Likewise, you can open MBOX file in Thunderbird using the manual method.

Limitations of Manual Method to View MBOX Files

There are some drawbacks of the manual solution while importing MBOX file into Thunderbird.
1. Not easy to transfer multiple .mbox emails directly into Mozilla Thunderbird account at a time.
2. Sometimes file corruption will occur during moving MBOX to Thunderbird profile.
3. Data loss occurs while adding more than one MBOX file.

Expert Method to Move MBOX Mail in Thunderbird

SysTools Thunderbird Import Wizard is a software that enables the user to transfer multiple MBOX file into Thunderbird. It allows the user to view single or multiple MBOX email files with attachments using “Select Files” or “Select Folders” option. The process will not corrupt any of the data. There are no any limitations in size to add MBOX to Thunderbird account. Also, the user can migrate selective files or folders from MBOX using filter option along with attachments. The software will work on all Windows Operating Systems like 10, 8.1, 8, 7.


In this blog, we have described two methods to add and open MBOX files into Thunderbird application. One is the manual method and another one is by using Thunderbird Import Wizard software. The manual method has some limitations for this process that the user cannot transfer multiple number of files at one time. Sometimes the data will be loss or file will be corrupt. A third-party tool makes importing MBOX file into Thunderbird an easy task and without any issues the users can move multiple email items at one time.

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