If you are searching for a solution to export Thunderbird emails to Outlook, then you are in the right place. Read the article carefully and know how to transfer all your Thunderbird mailboxes into Outlook with attachments. In this write-up, we will provide you with the complete step by step procedure that will help you accomplish the task irrespective of the technical knowledge you possess.

Mozilla Thunderbird is a free cross-platform email client that lets you add and manage multiple email accounts at once. It is mostly used by individuals for home-purpose and small-scale industries. It stores all its mailbox emails in the MBOX file format.

On the other hand, Microsoft Outlook is the most used email client that also acts as a personal information manager. It stores all data (emails, contacts, calendars, tasks, notes, etc) in PST files.

How to Migrate Mozilla Thunderbird into Microsoft Outlook

The best solution available to move Thunderbird data into Outlook is to use the three-step solution mentioned in the upcoming section. The first step includes locating the MBOX files of Mozilla Thunderbird. The second step is to convert the Thunderbird MBOX files into PST format. And the final step involves importing MBOX data in Microsoft Outlook.

Let us start with the elaborated steps.

Step 1. Locate the MBOX File of Mozilla Thunderbird

  1. Launch Mozilla Thunderbird and press the Alt key if the menu is hidden.
  2. Go to Tools and click on the Account Settings option.
  3. Now click on the Server Settings option and copy the location corresponding to Local directory.
  4. Each email account has its own location with its folder structure. Simply note down all the locations for the next step.

Finished! Now we know where the MBOX files are saved. You can also copy the folder for each profile to an easily accessible location if you so desire. Now, for converting MBOX to PST, you will have to download and install DataHelp MBOX to PST Converter.

Step 2. Convert Thunderbird Mailbox to Outlook PST Format

  1. Run DataHelp MBOX to PST Converter on your Windows PC.
  2. Use Select Folder to add the MBOX files for an entire profile at once.
  3. Click on Convert and set the destination location to save the PST file.
  4. Click on Ok and the tool will convert all the added files into PST format.

That’s it!! You can either repeat the steps for each profile location or simply add all the noted down locations one by one. Then, convert them all into Unicode PST at once.

Step 3. Importing Unicode PST in Outlook 2019, 2016, 2013, 2010, 2007

  1. Open MS Outlook on your system.
  2. Go to File>Open & Export > Import/Export > Import from another program or file > Outlook data file (.pst).
  3. Browse and add the converted PST file.
  4. Select the account and click on Finish.

This is how you can export Thunderbird to Outlook 2019, 2016, 2013, 2010, 2007 without losing email attributes or compromising with the conversion performance.

More Read: Resolve Common PST Errors in Outlook

Why Export Thunderbird Mailbox to Outlook?

There can be multiple reasons that can lead to Mozilla Thunderbird to Outlook migration. But all are caused by some sort of benefits that Outlook provides over Thunderbird. More benefits typically lead to higher productivity thus causing the conversion. Some of the advantages Outlook has are as follows:

  • Microsoft Outlook is compatible with Microsoft Exchange Server.
  • It provides better security features.
  • You can use Outlook on mobile to sync your data on your mobile devices.
  • Outlook has better email filters, schedulers, and spam filters.

Advantages like these and many more are the reasons why MS Outlook is the more preferred option over Mozilla Thunderbird.

Some Beneficial Features of DataHelp Conversion Software

Although there are many tools available in the online market, the reason why we chose this software is that it comes with very advantageous features. Some of which are as follows:

  • The tool enables you to convert multiple MBOX files at once.
  • It ensures that no email attribute is tampered with or gets lost during the conversion process.
  • It maintains the metadata properties and folder structure of Thunderbird profiles.
  • The software works hassle-free on all Windows OS including the latest Win 10, 8.1 and 7 models.
  • It does not impose any limitation on the number or size of MBOX files.


It is clear that using a software is the most effective way of exporting Thunderbird to Outlook PST format. However, since all tools are not up to the task, it is important to choose the one that fits your requirements. The mentioned software solution can easily access all the MBOX files of Thunderbird and even identifies the SBD folders. So, download the tool and take advantage of the various features it imparts while exporting Thunderbird Mailbox to Outlook.