-
Written By Shivam Rathore
-
Updated on December 11th, 2025
|
“ I have around 45 GB of MSG files downloaded on the PC from my Outlook profile. But I am unsure of how to access them within Thunderbird. Suggest to me the easiest and fastest way for MSG import into Thunderbird without data loss.” -Kelly Maidsmith |
MSG files are transitioned to Thunderbird for the reasons mentioned below:
In this section, we will discuss two top manual ways considered by users for the MSG file import. Also, learn about a reliable and verified professional software that experts generally recommend to ensure accuracy and no loss during the import.
There are two ways to do so, which include using the Outlook and Thunderbird applications. Or, you can directly try renaming from File Explorer. We have explained the complete step-by-step process for each one of them below.
#1: Convert MSG to Thunderbird with Email Applications
#2: Use the Rename Feature to Import MSG to Thunderbird
Though these methods are quite helpful, they are lengthy, tricky, and inconvenient for non-technical users. Also, you require the MS Outlook and Thunderbird applications for conversion, and there is no guarantee for accurate results. So, let’s choose a better alternative that makes imports secure, scalable, and optimal.
Importing MSG files to the Thunderbird email client one by one will be a cumbersome task. Therefore, for batch processing, use the MSG Converter that imports MSG files in bulk, ensuring 100% data authenticity. Also, it not only supports direct migration to Thunderbird but to other popular email clients as well. After importing the MSG files, it ensures that the original folder structure is preserved.
Simplified Steps to Migrate MSG Files to Thunderbird





The task to import MSG to Thunderbird becomes straightforward once you understand the format gap and the right methods. Manual methods work appropriately for a few individual MSG files, but when it come sto bulk conversion, you need speed and flexibility. Then, using the MSG File Converter is the best option. It ensures IT teams, support departments, and admins can safely move Outlook-based MSG collections into Thunderbird with full data integrity and zero loss.
Ans. To access MSG files with Thunderbird, you need an automated MSG File Converter that can directly save MSG files into your Thunderbird account, without Outlook installation.
Ans. If you’re using a trustworthy MSG Import Tool, you can import MSG files as well as their attachments into Thunderbird. However, if you rely on manual conversion, you risk losing any attachments that were associated with those messages.
Ans. Mozilla Thunderbird does not currently have a built-in option for opening MSG files natively. Therefore, you must use a third-party, reliable import tool to open MSG in Thunderbird.
Ans. The MSG Conversion Tool enables users to migrate multiple MSG files at once (in bulk). Typically, it is built for large-scale migrations.
Ans. If you use MSG Converter, all of the email’s relevant data (metadata), including when the email was sent or received and all of the header information, remains intact.
About The Author:
Meet Shivam, an experienced SEO executive and content strategist. He combines creativity with strategy to craft engaging content that connects with audiences and supports brand goals. With strong expertise in digital marketing and content planning, Shivam helps businesses thrive online.
Related Post
Useful Links
Important Links
© Copyrights 2014-2026 EasyTechTools is an affiliate partner of SysInfoTools - All Rights Reserved