How to Import a PST File in Thunderbird

There are many different email clients available. One popular freeware client is Thunderbird, produced by Mozilla, the authors of the popular Firefox web browser.

...

The most common email client is probably Microsoft's Outlook. Outlook allows you to create a backup file of all your email messages and contacts. This backup file is in a .pst format, and can be used to move your files from one computer (or email client) to another.

When switching to Thunderbird, you may experience difficulty in importing a standalone .pst file, since Thunderbird uses .mbox files instead and does not recognize .pst files. Workarounds do exist to import a .pst file.

Step

Use Outlook to decode the .pst file. If possible, install Outlook on the computer with Thunderbird and the rogue .pst file. Once Outlook is installed, select "File" > "Import and Export" to import the .pst file into Outlook. Once the messages/contacts have been successfully imported, open Thunderbird and select "Tools" > "Import" > "Mail within Thunderbird." Choose "Outlook" as the default client from which to import.

Step

Install Thunderbird onto another computer. If you can't install Outlook onto the desired computer (referred to here as "Computer 1"), install Thunderbird onto a machine with a compatible version of Outlook (referred to here as "Computer 2").

Step

Open Outlook on Computer 2. Copy the .pst file onto Computer 2. With Outlook open, select "File" > "Import and Export." In the window that pops up, choose "Import from another program or file" and click "Next."

Step

Choose "Personal Folder File (.pst)" and click "Next." Use the "Browse" button to navigate to the location of the .pst file and click "Open." Everything in the backup file--emails, contacts, etc.--will be imported into Computer 2's Outlook.

Step

Import the files on Computer 2's Outlook into Computer 2's Thunderbird. Open Thunderbird and select "Tools" > "Import." Click the "Mail" button and click "Next."

Step

Click on "Outlook" and click "Next." When the import is finished, click "Finish."

Step

Close Thunderbird. Click "Start" and navigate to "Your-username\AppData\Roaming\Thunderbird\Profiles__.default" (where the ** is a string of random characters). Copy all of the included files and folders to a flash drive and move the flash drive to Computer 1.

Step

Navigate to "Your-username\AppData\Roaming\Thunderbird\Profiles__.default" on Computer 1. Copy the files and folders from Computer 2 into that directory. All of the email info will now be available on Computer 1's Thunderbird.