How to Open MSG file in Thunderbird?

MSG is file extension for a mail message file created by MS Outlook Express. A MSG file can be simply created by dragging the file or message from Outlook folder and dropping that message on desktop of window explorer. Now the problem arises when Outlook is not installed and you want to open the MSG file or when you want to access that file in any other mail client which does not support MSG file format. Like if you want to access you MSG file in Thunderbird then you will need to migrate the file in EML/MBOX format which is file extension of Thunderbird.

In this page we will be discussing about how you can open your MSG file


1) When you have both MS Outlook and Thunderbird on your system

2) When you don’t have MS Outlook installed

Steps to Open MSG files in Thunderbird


1) When you have both MS Outlook and Thunderbird on your system

1. Run MS Outlook, Drag and drop the message file in Outlook

2. Click on ‘save as’ and select the location for saving the file

3. After saving location next in ‘save as type’ select TXT as the file format and click on Save

4. Then go to the file location and right click on file then from Rename change the extension from .txt to .eml

5. Now during conversion of file extension you will get a pop up warning prompt click Yes your file will be saved in .eml format.

6. Now to run the files in Thunderbird right click on the file and go to ‘open with’ option. From there select Thunderbird email application your file will be accessed in Thunderbird.

Drawbacks of this method

  • Requirement of both MS Outlook and Thunderbird
  • Not any security of data
  • Attachments cannot be migrated to EML file
  • This method is useful when there is less number of MSG files

2) When you don’t have Outlook installed

When MS Outlook is not installed on system then you have to use an alternate method i.e. by using Third Party tool to access MSG file in Thunderbird. The best software which is easy to use and will provide 100% accurate results is MSG to EML converter. This tool will help you in conversion of complete file along with attachments without any data loss and maintains hierarchy of data.

So follow the below given steps for converting MSG file into Thunderbird

  • Install and Run PST Converter Tool
  • Click on Browse/Add file to go to MSG files
  • Select the files which are to be exported
  • Take detailed Preview of the file before exporting
  • Select the location for saving the file
  • Next from saving option select ‘save to EML’
  • Click Convert your file will be exported shortly

Now reach the location where file was saved and right click on the file and Open with Thunderbird application. You will get all the data in same format as it was earlier.

Final Conclusion:

We have discussed to methods for using the MSG file Thunderbird. First solution that is manual method is lengthier, less secure and which cannot be used in absence of any one from Outlook and Thunderbird. First method can be used if number of file is less and does not contain any kind of attachments. We will like to recommend using of the second method for using MSG file in Thunderbird as it is developed to overcome the limitation of Manual process. This tool will migrate the file in easy and secure manner without taking much time.

Related Software: Looking for a software to Import MSG files to Office 365 or Exchange Server. Click Here