How to Open & View Thunderbird MSF Files? Free Solution

Published By Karen Chard

Approved By Rollins Duke

Published On April 17th, 2025

Reading Time 6 Min Read

Are you facing issues while opening Thunderbird MSF files? If it sounds right, then you are on the right blog. Here we have discussed the manual and free Thunderbird MSF file viewer to open MSF file without Thunderbird installation.

Thunderbird email client is a popular choice among experts and users for sending and receiving emails and managing their Thunderbird data efficiently. Also, it supports and generates multiple file extensions to save different types of data. And the MSF file extension is one of them. Before knowing the steps to open MSF file to view and read data, let’s understand what an MSF file.

What is an MSF File?

Thunderbird email client stores email data in MBOX format (without any file extension). And MSF stands for Mail Summary File, which is also known as Thunderbird’s Index file. And it mainly contains a header and a summary of the mail.

However, opening an MSF file without Thunderbird is not easy for non-technical users. But don’t worry. If you have these files and you are looking for a free Thunderbird MSF file Viewer or a way to use Thunderbird, then we will suggest the safest methods.

How to Open MSF File in Thunderbird?

Important Note: Your Thunderbird email client must be installed and connected with the proper account.

Locate your MSF files.
Right click and choose the “Open With” option.
After that, select “SeaMonkey” or “Thunderbird” to open MSF file in Thunderbird.
And your MSF file will be open here.

This is the right and appropriate solution to view Thunderbird MSF file, because you have to repeat the same process here again and again for each file.

Free Method to View MSF File without Thunderbird

Download the RecoveryTools Free Thunderbird File Viewer to view MSF file data without Thunderbird installation. Yes, there is no need to download or install any other solution, and also, you don’t have to pay a single penny for this tool.

This software is made with advanced algorithms, which make it powerful and simple to use for all users. The free Thunderbird MSF file reader allows you to preview multiple files at the same time. Multiple features and settings help to open msf file selectively as per choice.

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What is Special About this RecoveryTools Free MSF File Viewer?

Advanced Search Filter: This amazing MSF viewer tool provides an advanced search filter to find any particular email data. It gives you some settings like find whole word or case sensitive, and search only displayed headers or from the RAW message. You can even find the required data by applying specific dates.
Open MSF File without Thunderbird: This amazing tool is independent and standalone, so it doesn’t require any supporting application like Thunderbird email service.
Load Profile Data Automatically: The MSF file viewer has powerful features, like it can automatically uploading complete Thunderbird profile data, whether your Thunderbird application is working or not working due to corruption. It will load the data from the default storage location.
Maintains All Details: The Thunderbird MSF file viewer can maintain the original folder structure, Dates, From, To, and Subjects while opening the file.
Simple and Interesting Interface: Our developers have created the interface of this free MSF file reader very simple and easy to use for all users. Even non-technical users who have zero knowledge about the Thunderbird application can use the tool effortlessly.
No File Limitations: There is no file size limitation to open MSF file without Thunderbird account. Users can view unlimited MSF files without any restrictions.
Pro Version of Thunderbird MSF File Viewer: This software is the upgrade version to convert your Thunderbird files into 35+ saving options, including file formats, document file formats, web, server, cloud, and desktop-based email clients.

Let’s know how this MSF file viewer works, All the working steps are given below:

How to Open MSF File without Thunderbird? Complete Steps

Download and start the free solution to view Thunderbird MSF file data.
If your Thunderbird profile is connected with the same machine, then it will load data automatically, and if you have orphan MSF file then upload them using the “Open” button.
All your folders and subfolders will appear on the panel with the maintained folder hierarchy.
Click on any required file and analyze the desired file data.
Use the “Search” option from the top to find any particular file from the large number of Thunderbird MSF files.

Generally Asked Questions by Users

Ques: How to convert MSF to PST?
Answer: To convert your Thunderbird MSF files to PST format, you must purchase the advanced and upgraded version of this free MSF file viewer. Short steps are mentioned below to convert MSF to PST format:

Download and start the pro version.

Upload the MSF files and folders.

Check the needed folders and subfolders from here.

Choose “PST” as your saving type.

Apply filters and select the location path.

Hit the “Convert” icon for MSF to PST conversion.

Ques: What is the location of Thunderbird emails?
Answer: Here are the location of Thunderbird profile for emails and other data:

In Windows: C:\Users\UserName\AppData\Roaming\Thunderbird\Profiles
In Mac OS: /Library/ Thunderbird

Ques: Why should we purchase only the RecoveryTools MSF file viewer?
Answer: Because RecoveryTools is the best and first choice of expert brands to move, migrate, or open data. It provides a wide range of solutions with advanced features, which makes it powerful than other brands. It is a trustworthy brand that has been providing service for so long.

Ques: How can I purchase the upgrade version?
Answer: Head to the official page of Thunderbird file viewer (mentioned above) and select the Upgrade Now button, select the licensed edition according to your requirement, and make the payment. For any help, you can contact us through chat support.

Final Comment

Open MSF file using the RecoveryTools Free MSF File Viewer tool is the best and right option. Because first, it’s completely free for all, and second, it maintains your data and hierarchy properly without having any restrictions.

Also, there is no need to install or download the Thunderbird application. However, if you have a few files to open and Thunderbird is also installed, then go for the manual method. If you have any doubts, contact us at any time through live chat support.