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Written By
Simran Bhatia -
Approved By
Sonika Rawat -
Updated on
April 23rd, 2026 -
Read Time
7 minutes
“I am currently working on my Windows 10 OS and have Windows Live Mail in it. Since I have to switch to Thunderbird, I have installed it as well. However, I am not a techie expert and find it difficult switching to new clients. Can anyone suggest how I can securely move all my mailbox data from Windows Live Mail to Thunderbird without wasting time, effort, and extra costs?”
–Amranda Gabriel, New York
Email ecosystems are a real task. One moment, you are working with it without any difficulties, and the next, you find it to be a legacy mail platform that no longer supports operations. One similar email client is Windows Live Mail, discontinued in 2017, and hasn’t been restored ever since. Therefore, users tend to transfer Windows Live Mail to Thunderbird to access their historical mailbox data without any restrictions. To do so, this guide states the free solution and SysInfo EML Converter Tool, as Windows Live Mail stores its entire data in EML for secure conversions.
Switching email clients is not as simple as it sounds, and it requires caution to ensure that the data remains unharmed. Yet, for conversion, understanding why it is mandatory is equally important. So, the reasons for this conversion are presented here:
Well, even though this is important, there lies a major constraint in this email migration.
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The Challenge? Well, as mentioned above, Windows Live Mail supports EML format for data storage, which is not native to Thunderbird. Even though Thunderbird can support EML with an add-on extension, its native format is MBOX. So, proper methodology is essential to bridge this compatibility gap and perform a flawless data export. |
Though there is no direct EML import option in Thunderbird, the add-on extension simplifies this task without any hassle. You need to follow the steps below to make the transfer:
There is a chance that you don’t have access to the Windows Live Mail or its directory, but you will definitely have the EML files. So, an easy, smart, and absolute way to bulk migrate data from Windows Live Mail into your Thunderbird account is to use the SysInfo EML Converter Tool. This dedicated software eases your task and helps you instantly move the data with complete data integrity and preserved folder structure. Moreover, it has several advantages for complete user satisfaction during the email migration.
Note: You can even use it to convert Windows Live Mail to PDF, MBOX, or any other formats without data loss.





All the selected emails, no matter the size or count, will be transferred at once directly within your Thunderbird profile. You can open the application to verify if the emails exist.
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Tip: Interested in migration of WLM data to browser clients? Use this specialized software and migrate Windows Live Mail to Gmail without chaos! Try Demo to convert upto 50 emails per folder at no cost. |
Transfer Windows Live Mail to Thunderbird is a practical decision nowadays to ensure business operations are continued without any fallback. We present two scenarios of how this migration has benefitted users, IT admins, enterprise professionals, and others:
>> A mid-sized support group with over 300 archived customer interactions in Windows Live Mail was constantly experiencing crashes when performing searches. Upon migrating to Thunderbird, the typical response time for queries improved by around 60%. Also, the indexing of mailboxes became nearly effortless.
>> For a group managing more than 500 mailboxes during an infrastructure upgrade, the use of SysInfo EML File Converter Tool reduced the time to import Windows Live Mail to Thunderbird to a few hours with 99.9% data integrity retention. All while still ensuring that no data would be lost and that no manual oversight would be required.
This guide provided all the practical solutions to transfer Windows Live Mail to Thunderbird in an effective manner. Whether you are an individual with a few files or an enterprise with major data volumes in GBs or TBs, you can have a simplified data export.
The manual method with the ImportExportTools NG extension works on a small scale and results in minimal loss or alterations. Whereas, with the professional SysInfo Windows Live Mail to Thunderbird Migrator, complete batch exports offline quickly with no loss and 100% accuracy without effort and time wastage.
Ans. There’s no direct export method available. Whether manually or professionally, you need to have your WLM emails in an EML file, and then you can import them into Thunderbird directly.
Ans. WLM emails in EML format have embedded attachments, too. If you import it correctly, like by using the SysInfo EML to Thunderbird Import Tool, then all your attachments are transferred correctly with full integrity.
Ans. Yes, of course. Migrating large mailboxes from Windows Live Mail to Thunderbird is possible with the proficient EML Conversion Tool by SysInfo. It has no size limitations and no restrictions on the number of mailbox files. Also, it keeps the data consistent and avoids crashes.
Ans. To keep your read/unread status intact, you need to use the dependable and expert EML Converter Software. It is designed with advanced algorithms that keep your metadata intact.
Ans. Enterprises can import Windows Live Mail to Thunderbird at scale with the EML File Converter that allows offline batch processing, safe transfers, centralized control, speed, scalability, and log reports.
About The Author:
Simran Bhatia is a technical content writer engaged in writing clear, concise, and SEO-optimized content. With a background in computer science and a passion for writing, I thrive to deliver complex technical content in simple layman terms.
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