How to Open MSG File in Thunderbird Easily in Bulk?

  Rollins Duke
Rollins Duke   
Published: May 15th, 2025 • 6 Min Read

Summary: Are you switching from Outlook to Thunderbird and wondering how to open MSG file in Thunderbird email client? This blog explains why users need to import MSG files into Thunderbird, challenges with manual methods and how to overcome them using a reliable automated solution. You will learn differences between Outlook and Thunderbird compatibility step-by-step instructions to convert MSG to Thunderbird, and how a professional MSG to Thunderbird Converter tool can make the process easy and error-free without any other software.

Reasons to Open MSG File in Thunderbird

  • Users who are move from Microsoft Outlook to Thunderbird need to transfer their saved MSG email files to continue accessing important messages in their new email client.
  • Thunderbird is a free ane open-source email client. User prefer it over Outlook because it doesn’t require a license or subscription which make it a cost-effective choice.
  • Thunderbird runs on Windows, macOS and Linux. Import MSG files into Thunderbird help to access their emails across different operating systems.
  • MSG files are Outlook-specific and cannot be opened directly in Thunderbird. Convert MSG to Thunderbird allow to view and manage Outlook messages without needing Microsoft Outlook installed.
  • Export MSG files to Thunderbird will help in organizing and storing email backups in a more accessible and searchable format, especially for long-term email retention.
  • Thunderbird offers flexible folder management, advanced filtering and add-ons. Open MSG file in Thunderbird will allows users to reorganize and manage old emails more effectively.

Can Thunderbird Open MSG Files Manually?

  1. Open the MSG file by double-clicking it in Outlook.
  2. Click File > Save As.
  3. Select a destination folder and choose Text Only as the file type. Save the file.
  4. Open the saved .txt file.
  5. Again, go to File > Save As.
  6. In the “Save as type” dropdown, select All Files.
  7. Name the file using a .eml extension (e.g., converted-email.eml).
  8. A warning may pop up — click Yes to confirm the file extension change.
  9. Navigate to the folder where you saved it, right-click on the .eml file, choose Open With, and select Thunderbird.

Limitations of Manual Method to View MSG File in Thunderbird

Once you have decided to open MSG file in Thunderbird and trying to do so with manual approaches, it becomes a tough task! Users face multiple issues when they want to  import MSG files into Thunderbird using Manual methods.

  • Both MS Outlook and Thunderbird email clients are required to do the file conversion.
  • The entire conversion process is quite lengthy and time-consuming.
  • Sometimes MSG file with their respective attachments is not converted during the process.
  • The standard solutions do not guarantees 100% accuracy and safe data migration.
  • These manual tactics are helpful when there are countable MSG files for moving into Thunderbird.

So, in order to overcome these limitations, an alternate professional solution is the right path if you don’t have Outlook with you. The most helpful part of this software is that you don’t need to require Outlook to open MSG files in Thunderbird. It will smoothly and swiftly open .msg in Thunderbird within seconds.

How to Open MSG File in Thunderbird? Video Guide

There are situations when users don’t have Outlook with them. In that case, MSG files can’t be opened easily. So, you need an authentic product to open MSG files in Thunderbird. Just follow this process and you will get to know the complete information.

Simple Steps to  Convert MSG File to Thunderbird

  1. Firstly, download the setup file of the software to start the process. Install & Run it properly on your Windows machine.msg to thunderbird import tool
  2. Then, choose single or multiple MSG email files from the database.select files to view MSG file in Thunderbird
  3. Thereafter, analyze the preview of Message files with attachments before moving towards the next step.select folders to import msg files into thunderbird
  4. Navigate towards the saving formats provided in the GUI and pick Thunderbird as the file saving format.select thunderbird to convert msg to thunderbird
  5. Now, Enter a target path where you want to save the resultant output data.select destination path
  6. Hit on the Convert tab to start the process. Once the Conversion is done, the tool will show this message on the screen “Conversion Completed Successfully”.Successfully export msg file to thunderbird
  7. After file migration, the software will automatically show the default storage location where your MSG emails are saved. Lastly, Start the Thunderbird email client to open MSG File in Thunderbird.open msg file in thunderbird

Advantages of Software to Open MSG File in Thunderbird

This tool offers a bunch of useful benefits to its users. Some of them are described below:

  • The software offers dual options to upload multiple messages in a single go.
  • It is an advanced product and does not require MS Outlook to open MSG files in Thunderbird.
  • The tool does not impose file size restrictions to open MSG files in Thunderbird email client.
  • The software comes with a Simple and Easy Graphical User Interface to achieve file conversion.
  • It imparts the fastest migration speed during the process to open .msg file in Thunderbird.
  • It supports .msg files exported from Outlook 2019, 2016, 2013, 2010, 2007, and all.

Final Words

There are two techniques to open MSG file in Thunderbird with or without Outlook existence. However, it is highly requested to trust the best workable solution. For this, you can work with the above-mentioned software and procedure to open Outlook MSG file in Thunderbird. Since data integrity is our top-most priority, thus, this tool provides a complete assurance to meet up with customer demands. If still, you have any further queries, you can contact to our technical support team which is available for you 24*7.

MSG Toolkit