In this tutorial you will learn how to migrate thunderbird email to Outlook. Several methods have been described, both manually and automatically. You may also find a suitable way to get around the limitations of this method.

Mozilla Thunderbird is an open source cross-platform desktop email client for Windows, Linux and Mac. Many organizations and individual users use it as their default email program for sending and receiving email. It is also known for features like message management, plugins, themes, and spam filtering. However, many users are moving their email from Thunderbird to MS Outlook.

So, before jumping into the various solutions to import MBOX files from Thunderbird to your Outlook account, let’s briefly explain the main reasons for this migration process.

Reasons Behind Thunderbird to Outlook Transfer

MS Outlook is a popular email client service  developed by Microsoft. Known for its user interface, advanced security, fast synchronization and advanced features. Outlook is also compatible with SharePoint and MS Exchange Server. To enjoy all these benefits, many users are migrating Thunderbird to Outlook. It provides additional functionality for data sharing, storage, communication and collaboration.

Manual Method to Migrate Thunderbird Email to Outlook? 

Step 1: Enable IMAP protocol from Gmail

  • Log in to your Gmail account, click the Settings icon and select the Settings option


  • Click Forwarding and POP/IMAPfowarding-pop-imap-option2
  • Enable IMAP option


  • Click the Save Changes button


Step 2: Permit Less Secure Apps on Your Gmail

  • Go to


  • Click Security Options


  • Choose Less Secure App Accessgoogle-account-security-screen6
  • Enable the option to access less secure apps


Step 3: Set up Gmail in Thunderbird and import MBOX into Gmail

  • Start Mozilla Thunderbird


  • Go to Tools and select the Thunderbird option


  • Click Account Settings


  • Click on [Account Action]


  • Select the Add Email Account option


  • Enter your name, Gmail ID, and password, select Remember Password, and click Continue


  • Select IMAP (Remote Folder) and click on Finish


  • In the left pane, select your Gmail account


  • Right-click on your Gmail account and create a new folder


  • Give it a name and click on Create Folder button


  • Select your Thunderbird account and press Ctrl + A to select all emails


  • Right-click and choose Copy


  • Choose Gmail address and click the folder you just created


  • Check Your Gmail Folder


  • Go to Gmail account and check the folder


  • Click on Folder to Confirm


Step 4: Set up Gmail in Outlook

  • Start Microsoft Outlook


  • Click on File option


  • Choose Account Settings and click Account Settings


  • On the Email tab, click New


  • In the Add Account window, enter a name, enter your Gmail ID and password, re-enter your password, and click the Next button


  • After confirmation, the success screen will be displayed. Click the [Finish] button


  • Close the Account Settings Window


  • Close the Account Settings Window


  • Go to the left pane and click on your Gmail address to see your message


  • It’s done! You have successfully migrated Thunderbird to Outlook.

It allows you to quickly forward emails from Thunderbird to Outlook. You must have Outlook and Thunderbird installed on your computer to perform this migration.

Method 2: Export Thunderbird to MS Outlook Using the Drag and Drop Method

This method first exports the email from Thunderbird to EML format. Then import the EML file into Outlook. This method is useful for small mailboxes.

Step 1- Export Thunderbird Email to EML

  • Open Mozilla Thunderbird
  • select mailbox folder
  • Select the email you want to export. Use Ctrl + A to Select All Emails
  • Right-click on the selected message and choose Save As
  • Select the folder where you want to save the EML file
  • Press on the Save tab to start the export process.

Step 2 – Move EML File into Outlook

  • Open Microsoft Outlook
  • choose email
  • Right-click on the selected mailbox and choose New Folder option
  • Right-click on the selected message and choose Save As
  • Name the folder and click
  • Open the EML folder, select the EML file, and start dragging and dropping into the folder.

This method is simple, but only useful for small mailboxes. Importing a large mailbox causes my email client to crash. If you are looking for an easier way to perform this migration, you can try automatic solution. With this tool, you can quickly transfer multiple Thunderbird emails to Outlook PST. 

Disadvantages of Manual Methods

  • Not suitable for bulk email or bulk export from Thunderbird to Outlook
  • Possibility of data loss and data corruption
  • Folder hierarchy may be lost and data may be inconsistent
  • Not to mention that these methods are time-consuming and complicated.

However, the following alternative method overcomes all these problems.

Alternative Solution to Migrate Thunderbird Email to Outlook 2019, 2016, 2013, 2010

If you have trouble doing it manually, you can use Thunderbird to MS Outlook Migration Software, which is an efficient and reliable utility. It allows users to easily convert Thunderbird data to PST file format. This maintains data integrity and your data in perfect condition. The interface is very simple and easy to use, so even inexperienced users can use it without any problems. The tool has a user-friendly interface which makes it easy to use for the users. It allows you to create a Unicode PST file that can be easily imported into all the latest versions of Outlook (Outlook 2019, 2016, 2013, 2010, 2007, 2003, etc.).

Download from here:

Note: This software can be used on Windows computers. You can also download the free version of this app to migrate 50 items and only add 2 files for each type. To convert completely, you’ll need to purchase a software key.

4 Easy Steps to Transfer Bulk Thunderbird Emails Account into Outlook PST

  • First Run and Install the utility on your system

Download Software

  • Now click single, bulkfind option to include Thunderbird MBOX file

Select three Options

  • Now, choose the file that you need to export & Right Click to open “Export

Click on export

  • Click “Export” to transfer Thunderbird email to Outlook

migrate thunderbird to outlook


This article addresses several issues such as how to migrate Thunderbird email to Outlook versions 2019, 2016, 2013 and more. Here are two different ways to achieve conversions. However, this is a simple solution and we recommend that you use a professional method. Users can use the free demo version to migrate the first 50 emails from Thunderbird to their MS Outlook email client. If you have any questions about the solution or process, please contact us at: chat or send email.

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