How to import EML Files Into Mozilla Thunderbird Mail?

This guide describes the possible methods to import EML files into Thunderbird Mail. Below you will learn how to import single or multiple EML files as well as how to pick an automate solution to schedule the EML import Process.
Last edited 19 seconds ago by Pradeep katiyar
EML ( Email Message File ) is also a widely used file format for storing individual email messages. It contains the entire email message, including the sender and recipient information, message body, attachments, and headsers. Thunderbird, a popular open-source email client, uses the MBOX file format to store its emails. While Thunderbird doesn't natively support EML files, there are effective methods to import them into the application.

EML File vs. Thunderbird MBOX File: A Detailed Comparison

EML File
File Format
Standard format for storing individual email messages
Proprietary file format used by Thunderbird to store email collections
Self-contained file containing a single email message
Hierarchical file structure that can store multiple email messages
Used for archiving or sharing individual email messages
Designed for managing large collections of email messages
There are no rows in this table

Why Import EML Files into Thunderbird?

There are several reasons why you might want to import EML files into Thunderbird:
Preserve Email History: Importing EML files allows you to integrate your existing email archives into Thunderbird, providing a unified view of your email history.
Migrate from Other Email Clients: If you're switching from an email client that uses EML files, importing them into Thunderbird enables a smooth transition.
Backup and Restore: EML files can serve as a , allowing you to restore them in case of data loss.

Methods to Import EML File into Mozilla Thunderbird:

There three methods to upload/import .eml email files into Mozilla Thunderbird mail. We evaluate each tool and let you know which one is ideal for batch import of EML files, and which one for few EML files. So lets get stared with manual methods.

Import EML files Using Thunderbird ImportExportTools NG

Here are the steps to import EML files into Thunderbird using ImportExportTools NG:

1. Install the ImportExportTools NG add-on:

Open Thunderbird.
Click on the Menu button (three horizontal lines) in the top right corner.
Select Add-ons and Themes.
In the search bar, type "ImportExportTools NG".
Click on the Add to Thunderbird button next to the add-on.
Restart Thunderbird to complete the installation.

2. Create a dedicated folder (optional but recommended):

Right-click on Local Folders in the left sidebar.
Select New Folder.
Give the folder a name (e.g., "Imported EMLs").
Click Create Folder.

3. Import the EML files:

Method 1: Importing individual EML files:
Right-click on the folder you created (or any other folder where you want to import the emails).
Select ImportExportTools NG.
Choose Import Messages.
Select the EML files you want to import.
Click Open.
Method 2: Importing all EML files from a directory:
Right-click on the folder you created (or any other folder).
Select ImportExportTools NG.
Choose Import all messages from a directory.
Select Just from the directory.
Choose the folder containing the EML files.
Click Select Folder.
4. Verify the imported emails:
The imported emails should now appear in the selected folder.
Click on the folder to view the imported emails.
To import EML files from a different location, copy or move them to a convenient folder before starting the import process.
If you have a large number of EML files, consider importing them in batches to avoid any performance issues.

#2 Method: Import EML to Thunderbird Using Drag and Drop:

The manual method involves dragging and dropping EML files into Thunderbird.


Open Thunderbird and navigate to the desired folder where you want to import the EML files.
Locate the EML files you want to import.
Drag and drop the EML files from your computer to the desired folder within Thunderbird.

#3 Method: Automated Tool “Shoviv IMAP Backup and Restore Tool”

Shoviv and Restore is a third-party tool that simplifies the EML import process. If you're seeking a reliable solution to import EML files into Mozilla Thunderbird, considering the Shoviv IMAP Backup and Restore tool might be a prudent choice.
This tool offers a comprehensive approach to handle IMAP mailboxes and facilitates a seamless migration process for EML files into Thunderbird. Its functionality encompasses features tailored to Thunderbird's file formats, ensuring a smooth import experience.
User-friendly interfaces and positive user reviews contribute to its appeal, providing an efficient and straightforward means to manage email data. Compatibility with various system configurations and dedicated customer support further enhances its reliability.
However, it's recommended to go with its free trial option and if you find its perfect for you then go for a license one.

Follow the Below Steps to Import EML to Thunderbird:

Step 1: Run the Shoviv IMAP Email Backup and Restore tool.
Step 2: Click Restore jobs tab and select source type as EML.
Step 3: Create Restore job and pick the backup directory Path.
Step 4: Map Source EML file With the Thunderbird Mail folder.
Step 5: Click Next and Run Restore Job to start importing EML files.


Importing EML files into Thunderbird is a straightforward process that allows you to integrate your existing email archives or migrate from other email clients. The manual method provides a basic approach, while Shoviv IMAP Backup and Restore offers an automated and user-friendly alternative. By following these methods, you can seamlessly import your EML files into Thunderbird and enjoy a unified email experience.
Frequently Asked Questions:

Want to print your doc?
This is not the way.
Try clicking the ⋯ next to your doc name or using a keyboard shortcut (
) instead.