Convert Thunderbird Emails to MSG in Simple Steps

Here, in this blog you’ll get to know about all the methods on how to convert Thunderbird emails to MSG format with all the features and benefits also this blog provide the right steps for the process to complete the conversion securely and smoothly.

Oct 15, 2025 - sonanandi

If you’re looking for a reliable way to convert Thunderbird emails to MSG format, you’re not alone. Many users who switch from Mozilla Thunderbird to Microsoft outlook or change to MSG format often face challenges to find a direct and secure method.

In this blog, we’ll explain everything you need to know about Thunderbird to MSG conversion, including what msg files are, the right steps with all the features and the method to convert Thunderbird to MSG. So without any worry read this blog carefully.

Understanding the file format:

Thunderbird: Thunderbird store its data in MBOX file format, these files holds many messages together in a single database like file.

MSG format (Microsoft Outlook): MSG is individual email file format used by Microsoft Outlook. Each messages is saved separately with complete details like header, recipient, date, attachments and message body, etc.

 Why Convert Thunderbird Emails to MSG File Format?

There are several reasons why users export Thunderbird emails to MSG format:

Outlook compatibility: you can easily open MSG files in Outlook as MSG files directly open in Microsoft Outlook with a double click.

Email organization: each message is stored separately which makes it easy for email messages to be opened and searchable or share specific email.

Backup and archiving: MSG files are one of the best formats to save and backup email archives securely.

Forensic and legal use: MSG files preserve complete metadata with details which often helps with legal investigation and usually keeps for professional use.

Migration needs: MSG file formats are most compatible when migrating from one email to another such as with Outlook.

Manual Method to Convert Thunderbird Emails to MSG File Format                                  

Unfortunately Thunderbird doesn’t have a built in features to export Thunderbird to MSG format. But you can use a Thunderbird add on or perform few extra steps:

Step 1: Install ImportExport NG Tool                                                                 

1.      Open Thunderbird

2.      Choose add on and themes

3.      Search ImportExport tool NG and click add to Thunderbird

Step 2: Export Emails from Thunderbird:

1.      Open the folder.

2.      Select the emails you want to export

3.      Right click ImportExport tool and export the selected message to EML format.

4.      Save the messages to your computer in needed folder.

Step 3: convert EML to MSG                                                                      

Here you can export EML format to MSG as Thunderbird itself allows. You can do it by drag and drop the EML messages to Outlook and save them to MSG.

Limitation: The manual method is fine for single files. But it is slow, repetitive, time consuming and corrupt data during large scale conversion. Also doesn’t maintain the data structure automatically.

Automated method: Using A Professional Thunderbird to MSG Converter Tool

If you’re dealing with thousands of email messages and want a safe and accurate, folder wise conversion use this reliable tool- Thunderbird to MSG converter by CubexSoft. This automated tool is specially designed to export multiple Thunderbird emails to MSG format without any data loss saving both time and effort. This tool supports all the versions of Windows and Mac including the new ones.

Here let’s discover some key features:

·        It supports batch conversion which means you can export unlimited files in just a single use.

·        It supports the users with many amazing features and advanced filters such as selective or advanced migration, file saving option with date, to, bcc, cc, etc.

·        It has a simple and user friendly interface which helps both the professional as well as non-professional users.

·        It provides various file naming options to save Thunderbird emails accordingly

·        This utility provide preview before migration option in which you can view the selected files before proceeding for conversion.

·        This reliable tool keeps the original folder structure intact maintaining accuracy with same format even after the conversion.

·        It also offers a demo version of the software which let you change up to 20 emails per mailbox for absolutely free of cost.

Steps to convert Thunderbird emails to MSG:

Step 1: Install and launch the software in your desktop.

Step 2: Now select the files you want to export to MSG format. Here, you have option to manually select or auto detection of Thunderbird files.

Step 3: Preview the selected emails.           

Step 4: Select the format type to saving the output into required format. Here, choose MSG.

Step 5: Now choose the destination path where you want to save the output.

Step 6: Now click export and after the conversion is done save the report as CSV file containing details of the conversion process.

Conclusion

It may seem a little hectic to change or save to a specific format. But by using the CubexSoft Thunderbird converter you can easily and smoothly convert Thunderbird emails to MSG format without any data corruption. It can export Thunderbird emails to many other file formats such as MBOX, PST, PDF, Gmail, etc. Try its free demo and change up to 20 emails per mailbox without any cost.

More Posts