If anyone wants to import Windows Live Mail to Thunderbird. Then you can try the most successful that convert WLM not only in thunderbird also in multiple formats such as HTML, MSG, EMLX, MBOX, Office 365, etc. But the name of the tool is eSoftTools Windows Live Mail converter. It can support all editions of MS Outlook and Windows up to 10. It gives a free trial to all users for their ease.
Read more:- Import Windows Live Mail to Thunderbird