How to Convert Eudora to Thunderbird with Attachments ?

Rollins Duke
Published: September 9th, 2025 • 7 Min Read

Eudora was once the most widely used email client. But now, it has become outdated. Therefore, many users face difficulty in accessing the old emails and attachments on the modern systems. To manage the email securely, efficiently, and properly, users need to convert Eudora to Thunderbird. If you are the one looking for the solution to export Eudora Mail to Thunderbird, then this is the best article for you. Follow this guide to quickly understand how to migrate Eudora to Thunderbird efficiently.

Reasons to Convert Eudora to Thunderbird

Eudora is an outdated email client, whereas Thunderbird is maintained and updated with new features.
Mozilla Thunderbird provides modern encryption standards for email security, whereas Eudora lacks these modern security features.
Mozilla Thunderbird is compatible on most of the cross-platforms, whereas Eudora has limited compatibility with the new operating systems.
Thunderbird is compatible with large mailboxes, and it also provides smart filters, efficient management of folders, and many more features that Eudora lacks.
The import Eudora to Thunderbird process ensures long-term reliability and better security.

Manual Way to Convert Eudora to Thunderbird

One of the most common ways to import Eudora to Thunderbird is by using the manual import approach helped by Thunderbird’s Add-On. Before you migrate Eudora to Thunderbird, you need to locate the .mbx files where Eudora stores the email data.

If you are using Eudora 8 on Windows 8 or Windows 10, the default storage path is:

C:\USER_NAME\AppData\Roaming\Qualcomm\Eudora\

Unless you have selected a custom folder, all the Eudora Mail files will be stored in the following directory:

Macintosh HD: User: Documents: Eudora Folder

Now, follow the procedure or steps provided below to manually export Eudora Mail to Thunderbird:

Open the Mozilla Thunderbird account and move to the menu button.
Now, click on Add-ons and Themes.
Search for the ImportExport Add-on in the Add-ons Manager Windows. Now, select ImportExportTools NG and select Add to Thunderbird option.
Now, restart the program and move to the Mozilla Thunderbird mailbox section and right-click on the email and select ImportExportTools NG, and then import MBOX to Thunderbird.
Move to the location where the MBOX files are and select the necessary or required ones and click on the OK button.
Lastly, move to the Mozilla Thunderbird mailbox window again and click on the file that was imported to see its email contents.

Drawbacks of the Manual Way to Import Eudora Mail into Thunderbird

Although the manual way helps to transfer Eudora Mail to Thunderbird, it also has many limitations and drawbacks. Some of the drawbacks of the manual way to convert Eudora to Thunderbird are mentioned below:

A manual way to convert Eudora to Thunderbird may be a time-consuming, lengthy, and challenging process, as locating the mailbox files, renaming the extensions, and placing them into Mozilla Thunderbird’s directory can consume a lot of effort, time, and require multiple steps.
There is a risk of data loss if you import Eudora to Thunderbird with the manual or conventional way as there is always a possibility of missing the files while you manually migrate Eudora to Thunderbird.
Technical knowledge is required to export Eudora mail to Thunderbird manually.
A manual way to import Eudora Mail into Thunderbird may provide some inconsistent results, as some emails may appear corrupted or the hierarchy may be lost.
The manual method to convert Eudora to Thunderbird is not suitable for bulk migration and is prone to errors.

Professional Way to Convert Eudora to Thunderbird

The manual way to transfer Eudora mail to Thunderbird can be confusing and difficult. Therefore, experts recommend using BitRecover Eudora Email Converter to import Eudora to Thunderbird within a few simple steps. It is a simple and beginner-friendly way to export Eudora Mail to Thunderbird. This tool is also known as Eudora to Thunderbird Converter, which comes with a free demo version so that users can easily evaluate this software. The steps to convert Eudora to Thunderbird professionally are mentioned below.

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How to Convert Eudora to Thunderbird Professionally?

First, download Eudora to Thunderbird converter software into your Windows computer after that follow given steps for transferring Eudora to Thunderbird.

Run Eudora to Thunderbird converter, it will automatically pick all email messages and items from default storage location of Eudora Mail client. Now, select all folder from software panel and press Save button.
The tool offers various saving formats, from here MBOX as saving format and click on Folder icon as shown in the screenshot.
Select destination path and click on Ok to continue.
Confirm destination path by clicking on the Ok button again.
Converting Eudora Mail to Thunderbird format, please wait.
After completing the migration process, go to the destination path to get resultant data.
Run Mozilla Thunderbird email client and choose File and then ImportExportTools and after this choose Import MBOX file option and complete the procedure. Now users can access Eudora Mail to Thunderbird.

How to Import Eudora Address Book to Thunderbird?

Eudora to Thunderbird converter supports conversion of Eudora address book, nicknames which are saved into nndbase.txt or nndbase.toc formats. First, convert Eudora contacts to VCF (vCard) format after that import resultant VCF file to Thunderbird by following these simple steps:

Start Mozilla Thunderbird email client and click on Address Book option.
Now select Tools and then Import option.
Select Address Books and press Next button.
Select vCard file (.vcf) and complete the process. After completing the procedure, users can access Eudora contacts to Thunderbird.

Features of the Professional Tool

This Eudora to Thunderbird Converter supports all important Eudora Files.
It provides multiple file naming options to users and migrates the database of Eudora by maintaining email headers, hyperlinks, and many more.
It is an independent and standalone solution, as there is no need to download any other application along with this Eudora to Thunderbird Converter.
You can convert Eudora to Thunderbird with 100% accuracy and security.
It also provides a free demo trial version for users to check the efficiency of the tool to export Eudora Mail to Thunderbird.
It helps to import Eudora Mail into Thunderbird without any errors and provides a search option to find out any specific information from all the Eudora data.
Users can view Eudora mailboxes in the software panel before they migrate Eudora to Thunderbird.

Conclusion

After reading this article, all Eudora Mail users can easily convert Eudora to Thunderbird in a professional way. This article has also described the steps to import Eudora address book into Thunderbird. Just follow these steps to migrate Eudora to Thunderbird including emails, address book, attachments and other all email components.

FAQs

What Is the Best Tool to Transfer Eudora Mail to Thunderbird?

The above-mentioned tool works best to export Eudora Mail to Thunderbird.

Is There a Need to Convert Eudora MBX to MBOX for Mozilla Thunderbird?

No, there is no need to convert Eudora MBOX to MBOX for Mozilla Thunderbird if you use the above-mentioned tool.

Where are Eudora MBX Files Stored on Windows 10/11?

On Windows 10/11, for older versions, Eudora stores the MBX files in:

C:\Program Files (x86)Qualcomm\Eudora\Mail\

For Eudora 8:

C:\Users\<YourUserName>\AppData\Roaming\Qualcomm\Eudora\Mail\