Most users know that migration from Thunderbird to Outlook is not an easy task for any organization. There are different types of data management in an organization and email messages are one of them. To maintain the order and properties of any mailbox, it is important to use a reliable and certified application.
Best Way to Export Thunderbird Emails to Outlook
The best way to export Thunderbird to Outlook in 2025 depends on your needs. For example, if you want to convert a single or small number of emails, you can manually save mailboxes in EML files and drag-and-drop them into Outlook. However, this method works in older versions.
Another manual method is to use an IMAP account as a temporary server to sync emails between two clients. But this is a big process that may also cause data loss. Read here to know all the steps- Export emails to Outlook from Thunderbird
Use a dedicated third-party tool to move data from one environment to another at a large scale. Data is one of the most valuable assets in any organization. Keeping it secure not only protects your business but also gives you a competitive edge.
All Manual Methods to Convert Thunderbird to Outlook
This is an easy way to migrate a limited number of messages. So if you are moving large data, make sure to create a backup of the data.
Method 1: Manual drag-and-drop (for few emails)
Move MBOX to Thunderbird:
The first step is to ensure that the MBOX file is present in Thunderbird, if not, then import it.
Export from Thunderbird:
Select the emails or folders you want to save. Right click and go to Import-Export and export the data to EML.
Import to Outlook:
Open Outlook and create a new folder. Drag and drop the .eml files from the folder where you saved them to the newly created Outlook folder.
Method 2: Using an IMAP account (for large transfers)
This method uses Gmail or another IMAP server as an intermediary.
Configure in Thunderbird: Set up your IMAP email account (such as Gmail) in Thunderbird.
Sync emails: Drag and drop emails from your Thunderbird folder to your Gmail account in Thunderbird.
Configure in Outlook: Set up the same IMAP account in Outlook.
Sync to Outlook: Emails will be synced from the IMAP server to Outlook, allowing you to transfer them to a .pst data file in Outlook.
Method 3: Third-party conversion tool (for selective and bulk migration)
This works on Thunderbird, Apple Mail, Entourage, and all other MBOX-based email clients. All you need to do is choose the right tool to migrate the data.
MailsDaddy Thunderbird to Outlook tool is a robust program to export Thunderbird mailbox to Outlook PST format. The application ensure to manages internal and external folder structure during the whole migration and export every single emails from Thunderbird to PST format. User can also create single or separate PST for all Thunderbird folder.
Steps to Export Thunderbird to PST for all Clients
Download and install: Download MailsDaddy Thunderbird to Outlook converter tool.
Select Data: The software will automatically load your Thunderbird profile using Auto-load or allow you to select the data manually.
Convert to PST: Choose to convert your Thunderbird mailbox data to Outlook PST format.
Conversion Option: Enable single or separate PST option
Export to PST: Save the destination and hit on Export button to start conversion.
Once you PST file is ready then,
Import PST to Outlook: Open your Outlook and follow the path: File > Open > Open Outlook Data File.
Final Verdict
In 2025, there are several reliable methods to export emails from Thunderbird to Outlook PST format. Both manual techniques and third-party applications allow organizations and individual users to migrate their mailboxes without hassle. Among the available solutions, MailsDaddy Thunderbird to Outlook Converter stands out as a user-friendly and efficient tool. It enables users at every level—beginners to advanced—to seamlessly convert Thunderbird mailboxes into PST files while preserving data integrity.
For step-by-step guidance and additional details, please visit the official MailsDaddy website.
