How to Import EML Files to Thunderbird Profile?

If you’re looking to import EML files to Thunderbird profile, you’re in the right place. This guide will walk you through the procedure step by step, using best practices to ensure a smooth and efficient migration.
Mozilla Thunderbird is a widely used, open-source mail client known for its flexibility and powerful features. It’s popular in both business and personal environments for sending, receiving, and organizing emails. At times, users may need to import EML files to Thunderbird especially when switching email clients or consolidating email backups.
Before we dive into the import procedure, let’s take a quick look at what EML files are and why Mozilla Thunderbird is a preferred platform for managing them.
What Are EML Files and Why Thunderbird?
EML Files store individual email messages and are supported by various email clients such as Apple Mail, Eudora, eM Client, Outlook Express, Windows Live Mail, Thunderbird, etc. These files include essential email elements like:
- Sender and recipient details
- Subject line and message body
- Attachments and hyperlinks
- Date and time stamps
Thunderbird is an open-source, desktop-based email application. While it’s not a webmail service, it functions as a robust personal information manager. Thunderbird supports features such as:
- Email communication
- Calendar and task integration
- Contact management
- Chat functionality
- A wide range of add-ons and extensions
Given its versatility and support for EML format, Thunderbird is a popular choice for importing and managing email archives.
Why Import EML Files to Thunderbird Profile?
Here are the key reasons why users choose to import EML messages into Thunderbird account:
- Free and Open Source: Mozilla Thunderbird is completely free and supports EML emails natively.
- Advanced Search Options: Users benefit from quick search capabilities and smart filters.
- Organized Email Management: Supports message grouping, tagging, and email views for easier communication.
- Robust Security: Includes features like spam filtering, firewall compatibility, and antivirus support.
- User-Friendly Interface: Offers a consistent design and customizable interface.
- Add-on Support: Thunderbird offers extensive extension support for enhanced functionality.
In the upcoming section, we’ll guide you through the different methods to import EML to Thunderbird both manual and automated so you can choose what works best for your needs.
How to Import EML Files into Mozilla Thunderbird: Manual & Automated Methods
If you need to import EML files into Mozilla Thunderbird, there are both manual and automated solutions available. This guide outlines two manual methods and recommends a reliable automated tool to streamline the process—especially useful when dealing with large batches of files.
Technique 1: Manually Import EML to Thunderbird via Drag and Drop
This is the simplest manual method and doesn’t require any add-ons.
- Launch Mozilla Thunderbird on your device.
- Make a new subfolder by right-clicking an existing folder (e.g., Inbox) and selecting New Subfolder.
- Name the folder and press Create Folder.
- Open the location on your device where your EML files are saved.
- Drag & drop the EML files into the newly generated Thunderbird folder.
Note: Your chosen EML files will now appear within the folder in Mozilla Thunderbird.
Technique 2: Import EML Files Using ImportExportTools NG Add-on
For greater flexibility and better control over the import process, use the ImportExportTools NG extension.
- Open Thunderbird and go to Menu > Add-ons and Themes.

- Search for ImportExportTools NG, then click Add to Thunderbird.

- Restart Thunderbird to activate the add-on.

- Right-click Local Folders and pick New Folder, then name it and tap Create Folder.

- Right-click the new folder and go to ImportExportTools NG > Import EML emails.

- Pick the EML files from your device and press Open to import.

Limitations of Free Manual Approaches
- No bulk import option; you must select files manually.
- Not beginner-friendly requires basic technical know-how.
- Time-consuming for large datasets.
- Increased risk of data loss or incomplete imports.
Recommended Solution: Use EML File Converter
For a more efficient, quick, fast, precise, reliable, and cost-effective method, the BitData Migration EML Converter offers a complete solution for importing EML files into Thunderbird and many other formats and platforms like Zimbra, WLM, IMAP, Lotus Notes, Office 365, Exchange Server, Office 365, Gmail, Yahoo Mail, G Suite, PST, PDF, MBOX, DOC, CSV, HTML, MHT, ICS, etc. It’s ideal for users who want to convert multiple EML files into Thunderbird account in single go without missing any database. Moreover, this robust EML to Thunderbird Conversion Tool also smoothly works with all Macintosh and Windows Operating Systems.
How to Use EML to Thunderbird Tool: Working Procedure
- Download and run the EML to Thunderbird Converter on your latest operating device.
- Choose either Single File or Multiple Files and upload your EML files.
- Pick the desired folders from the tree structure.
- Preview email content if required, then press the Next.
- From the Select Saving Options list, choose Thunderbird.
- Apply additional options according to your needs.
- Hit Convert to begin the EML to Thunderbird migration.
- Save the generated log report for your records.
Wrap Up
In this article, we explored what EML files are, their compatibility with Thunderbird, and why many users choose to import them. While manual methods like drag-and-drop or using Thunderbird add-ons can work for small imports, they’re not ideal for bulk conversions.
For a secure and user-friendly experience, we recommend using an expert utility like EML to Thunderbird Conversion Tool. It offers flexibility, preserves data integrity, and simplifies the entire process making it the perfect solution for both individual and business users.
