You cannot import pst files, they are Microsoft specific.

You need to get it either converted into mbox files or using Outlook save the emails as individual .eml files to a folder on eg: your desktop.

You can then import .eml files or mbox files into Thunderbird using this addon extension: ImportExportTools

• https://addons.mozilla.org/en-GB/thunderbird/addon/importexporttools/

In order to install a downloaded extension, please do the following:

1. Click the menu button and choose Add-ons.
2. Drag your downloaded XPI file to the Add-ons Manager tab and drop it.

or

1. Click the menu button and choose Add-ons.
2. Click the gear icon at the top-right corner to the left of the search box and select Install Add-on From File…
3. Locate the XPI file you downloaded and click Open.

You may need to restart Thunderbird when prompted. For more detailed instructions and information about installing add-ons, see Installing an Add-on in Thunderbird.

Thanks - I am a bit confused because some of the past posts referred to imports of PST files into Tbird, using a right click on a new local folder to show an "import" option..

I am searching for an email programme that will import PST files and I thought Tbird did that but If I understand your reply correctly, this will be a fruitless task.

I have thousands of emails so an EML conversion will not be practical. Do you know how to convert a PST file into an Mbox file ? Thanks

MailStore Home is a free program for home users.

It will archive e-mails from many e-mail programs, including Microsoft Office Outlook. Then it can be used to "export" that archive to many different e-mail programs, including Thunderbird.

This is the best, easiest way, and it is free for home users.