How to Import Thunderbird Email to Thunderbird in Bulk?

Published By Jamie Kaler

Approved By Rollins Duke

Published On October 28th, 2025

Reading Time 6 Min Read

Overview: In this blog, we will understand everything about how to import Thunderbird mail into Thunderbird using the manual and professional methods. The blog also contains the reasons to import Thunderbird email to Thunderbird. Hence, read the complete blog to understand everything in brief.

The process to import Thunderbird email to Thunderbird refers to the transfer of mailbox data from one Thunderbird profile or system to another. This process is usually done when users upgrade their computers, create a new Thunderbird profile, or reinstall the Thunderbird application. It ensures that all the old emails, attachments, account settings, and folders remain accessible in the new setup.

Need to Import Thunderbird Email to Thunderbird

Before understanding how to import Thunderbird mail into Thunderbird, we need to understand the need to import Thunderbird email to Thunderbird. Some of the following reasons are mentioned below.

Users who want to move their emails to a new computer or reinstall Thunderbird, import Thunderbird email to Thunderbird.
IT Administrators transfer Thunderbird emails to another Thunderbird for migrating multiple user accounts or restoring data from backups.
Researchers or students who want to retain necessary academic or emails for the future do this import process.
It is also done for accessing old messages in the latest Thunderbird setup.
For maintaining email continuity after switching operating systems, people import Thunderbird email to Thunderbird.

Manual Way to Import Thunderbird Email to Thunderbird

The manual method involves two phases. The first step is to export MBOX files from Thunderbird, and the second step is to import the MBOX to Thunderbird. Users can skip the first phase if they have already saved Thunderbird emails locally on the device. Read the following steps to import Thunderbird email to Thunderbird using the manual method.

Phase 1: Export MBOX Files from Thunderbird

Run Thunderbird on your computer device and click Alt. Then, at the top, select the Tools option and click on Add-ons and Themes.
Search for ImportExportTools NG and select “Add to Thunderbird” option.
Now, choose any label from the local folder, such as the Inbox, and right-click on it.
Select ImportExportTools NG and select Folder Export (mbox) and choose As MBOX File.
Now, select the folder and click on the “Select Folder” option.

Phase 2: Import MBOX to Thunderbird

After completing the first phase, users can proceed in two ways based on their import requirements. They can either transfer the downloaded Thunderbird emails to another device, install Thunderbird there and import them, or keep the files on the same device. Follow the steps provided below to complete the import process locally.

Open Thunderbird. Now, right-click on the local folders.
Choose ImportExportTools NG and select the “Import mbox Files” option.
Now select the “Individual MBOX Files” option and navigate to the folder where you have saved the MBOX file and click on the “Open” button.

Drawbacks of the Manual Way

The manual method involves multiple steps and phases, which makes it confusing, time-consuming, and complex.
While exporting or importing. The email or attachments may get corrupted if not handled properly.
Users have to import MBOX files one by one, which is not suitable for large mailboxes.
There is a chance that the folder hierarchy may not be preserved or maintained after importing.

Professional Way to Import Thunderbird Email to Thunderbird

The manual method is a lengthy and time-consuming process. Therefore, the professionals recommend using the RecoveryTools Thunderbird Migrator. This is a reliable and trustworthy software to import Thunderbird email to Thunderbird quickly, securely, and efficiently without losing any data. Users can migrate Thunderbird emails along with the attachments using this software. The tool can be used by both beginners and professional users.

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Steps to Import Thunderbird Email to Thunderbird Professionally

To understand how to import Thunderbird mail into Thunderbird professionally, follow the steps provided below.

Run the software on your computer device and read the instructions carefully, and click on the “Next” option.
The tool provides multiple data selection options. Choose any one among them according to your requirements.
Select the required folders that you wish to import to Thunderbird.
Select “Thunderbird” from the 25+ select saving options provided in the software.
Click on the Filter Tab and apply the desired ones according to your need.
Now, click on the browse icon and select the path of the configured Thunderbird account.
Now, the process to import Thunderbird email to Thunderbird has now completed successfully.

Expert Assistance: If you have any issues in using this software, you can choose the professional import services. In this, our RecoveryTools Support Team will handle the entire import process remotely for you while maintaining data safety and providing certificates for the same as well. You can also ask the Support Team for customizations in the software according to your work needs or requirements.

Powerful Features of the Professional Tool

Users can batch migrate Thunderbird email to Thunderbird using this software.
It is an independent and standalone software. Additionally, there is no need to download any other software along with this tool.
It maintains and preserves the original folder hierarchy and is compatible with both Windows and MacOS.
The software can be used by any person, whether they have a technical background or not.
It provides a free trial version for users to check the efficiency of the tool.
There is no file size restriction, and the tool is trustworthy and reliable.
The software offers more than 25 saving options.
It also provides a detailed log report after the import process is completed, which includes Saving Type, Path, Items Converted, and Start Date and Time.
The tool provides advanced filter options such as Date Range, From, To and many more which helps in decluttered output.

Conclusion

In this blog, we learn about the need to transfer Thunderbird emails to another Thunderbird, and how to import Thunderbird mail into Thunderbird using manual and professional methods. Since the manual way has a lot of drawbacks, experts recommend using the professional solution. The above-mentioned professional solution is reliable and secure.

For More Assistance: In case you have any issues, you can directly email us at [email protected], or you can go for the live chat support. The team will respond shortly and will try their best to solve all your queries regarding importing Thunderbird email to Thunderbird.