Review of an Experienced Thunderbird to Outlook Converter

Editor’s Note: The post is written by Stephen Ronald. It will help you to understand what the need of Thunderbird to Outlook Converter is and how to use the software. I am also sharing why I needed to migrate Thunderbird to MS Outlook mail client. So you can read the complete article to know everything happens with me during the migration process.

What was My Need?

Our organization was using a free email client “Mozilla Thunderbird” from past three years for emailing purpose. It’s free but provides only limited functions such as email, news, and chat facilities that was not enough for our business. Earlier, I came to know about Outlook, an email client of Microsoft. The application provides all those functions we needed such as Emails, Contacts, Calendars, Tasks, Meetings, and Journals, etc.

After installing MS Outlook, I saw that there is no option available to import or migrate Thunderbird data that was saved in .mbox extensions. After reading a wiki article on Microsoft, I found that MBOX to PST conversion is the only way to do the migration task. One can also check the article here:  


What I Did to Import Thunderbird Folders in MS Outlook?

I was searching solution for “How to migrate Thunderbird local folders to Microsoft Outlook”. I got many results saying same think that we need to convert MBOX files of Thunderbird mail client into PST format first which is importable with all editions of MS Outlook. Finally, I got a reliable solution by reading a Microsoft Wiki article.

The article specifies both techniques (manual as well as software) to migrate Thunderbird to MS Outlook. I tried manual method first which was really good, but time taking for me because I need to migrate 100+ MBOX files to MS Outlook, which may take several days. When I used another method that was paid but suitable for me. I Downloaded a software was suggested in the article and converted all MBOX files of Mozilla Thunderbird into PST files at once. In this way, I was able to do what exactly I want to do.

Functions of Thunderbird to Outlook Converter I Experienced!

Thunderbird to Outlook Converter is efficient utility that enables the Thunderbird users to migrate their data to Outlook PST, EML and MSG formats. The review will help you to be better acquainted with the features and working of Thunderbird to Outlook Converter. By the end of this review, you will be able to decide the features that best suit your conversion needs.

Working Of Thunderbird to Outlook Converter

In this section, we will describe the complete working of the software in detail. All the steps have been accompanied with screenshots to give you a detailed and comprehensive understanding of each step.

Step 1: Adding Thunderbird MBOX File

The first step after launching the software is to add the Thunderbird file that needs to be converted.


Step 2: Selection of Email Application

From the drop down menu select, Mozilla Thunderbird option.



In case, Thunderbird is installed in your machine, then click on Default File Configured option, otherwise go for Select file(s)/folder from file system option.

Step 3: Browse MBOX File

In case, you want to convert an entire folder that contains multiple MBOX files, then select Use Folder Mode option and browse the folder. If only a single file needs to be converted, then disable this option.


Step 4:  Complete Preview of All the Files

The software will enlist all the Thunderbird MBOX files that have been added to the software for conversion.


Step 5: Export Selective Thunderbird Emails

You can select and export selective mails from any of the MBOX files. Select the emails and right click and click on Export.


Step 6: Export Selective Folders

In case you want to convert selective or all folders to PST format, click on Export.


Step 7: Select the Desired Folders

If you want to export all the folders of the MBOX file, then select Export All Folder option. In case you wish to export only some folders, then select Export Selected Folders option and then select the required folders.


Step 8: Choose Export Option

Select PST option to convert your Thunderbird data to Outlook PST format.


Step 9: Split Output PST

If your Thunderbird data is very large, then you can split your output PST file by selecting PST Split option.


Step 10: Progress Report

Once the user clicks on Export option, the software starts processing the conversion of the Thunderbird data.



  • Conversion of single as well as bulk Thunderbird files.
  • Selective data exporting prevents exporting unnecessary data.
  • Split PST option prevents corruption of output PST files.


  • Attachment media files can be viewed only after they are exported.
  • No provision to convert corrupted Thunderbird data.
  • The free edition of the tool converts only first 25 emails per folder.


On the basis of, the different features and overall functioning of the software, we would rate the software as 9.8/10. Even though, the software does not convert corrupted Thunderbird data, it effectually converts bulk Thunderbird data to Outlook. It is a complete tool coming from the house of trusted sources.

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