How to Migrate Microsoft Outlook Mailboxes to Thunderbird Client?



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Outlook is a well-liked email client among a lot of business and home users. It acts as a personal information manager which is available with Microsoft’s Office Suite. PST and OST are the file formats used for working online and offline respectively in Outlook. With Outlook, a user can easily maintain calendars, schedule meetings, and share mailboxes.

Thunderbird is a free of cost application accessed on Windows, Mac and Linux operating systems. The email client mainly supports .mbox format for data storage. MBOX file format is well read by several other email clients like Apple Mail, Entourage, SeaMonkey etc.

Reasons to export Outlook to Thunderbird


Being Thunderbird, a free and multi-platform supporting email client it is liked by users. A user need not to pay anything for Thunderbird client. You can run this application on Mac, Windows and Linux OS. It is a light-weight and handy application with so many themes and extensions to enjoy.

Transfer Outlook emails to Mozilla Thunderbird client

Since Outlook files are not opened in Thunderbird when a user switches Outlook and moves to Thunderbird. To read Outlook files in Thunderbird, the need to move Outlook emails to Thunderbird is required which can be done using the mentioned below steps.

Steps to migrate Outlook mailbox to Thunderbird

  1. Open Thunderbird email client on your system.
  2. Go to the Tools tab and then choose Import

  3. Mozilla Thunderbird

  4. Click on Mail button and then click on Next button.

  5. Mozilla Thunderbird

  6. An Import wizard is opened, choose Outlook and click Next option.

  7. Mozilla Thunderbird

  8. A next window showing message Mails are successfully imported from Outlook. Click on Finish button.

  9. Mozilla Thunderbird

Professional Tool – to export Outlook email messages to Thunderbird client

There is an alternate solution for those users who prefer professional techniques to move MS Outlook emails to Thunderbird client.

Datavare PST to MBOX Converter Expert

The software is an ultimate and easy to handle application with some simplified clicks that convert Outlook file in MBOX format. The software is so simple to understand and has several features to work comfortably and quickly.

Key features of Outlook to MBOX Conversion Tool

  1. Quick and simple handling application
  2. Easily work with any size Outlook PST file
  3. Compatible with all MS Outlook editions
  4. Single platform to perform the conversion with 3-4 steps
  5. Independent application with no extra tool
  6. Perfectly work on all Windows platforms including XP, Vista, 7, 8, 10 etc.

Steps to migrate Outlook emails to Thunderbird with professional approach

  1. Freshly, download the application on your PC.
  2. Launch and run the software. Go to Browse button and add PST file whom you want to move to Thunderbird.
  3. Select Output MBOX file options – multiple or single MBOX file.
  4. Click on Browse button and select an output directory to save the results. Click on the Convert Now button.

  5. Datavare Outlook to Thunderbird

Final words

With this article, a user can easily convert Outlook emails into Thunderbird. However, we would like to mention here that the professional approach assures full data safety for the migration. Without any trouble, a user can convert any size healthy PST file from MS Outlook any version to Thunderbird application using software technique. It is one of the best methods for large size PST file conversion to Thunderbird client.