Importing email from Windows Live Mail to Thunderbird
Why might you want to switch from Windows Live Mail to Thunderbird?
Because the Windows 10 Mail app doesn't support POP3 email. Yep, that's right. How stupid is that? IMAP only.
And, Windows Live Mail isn't available for Windows 10.
So there you have it. If you have 15 years of email in your POP3 inbox, you cannot use the Windows Mail App. You have to install something else, and if you are on Windows, there are very few decent free email clients to choose from.
It is possible to export emails from Windows Live Mail. Choose Export, use the Windows Live Mail format (or you'll get a MAPI failure error message) and then, important, pick a folder to export. You have to pick a folder, and not the account you're exporting from, other wise you get zero .eml files.
If you see a count of emails being exported, then it worked. You should end up with a folder full of .eml files.
Then, on the new computer, in order to import email into Thunderbird, you just drag and drop the .eml files into a mail folder in Thunderbird. You don't have to use an Import method, and you don't have to use an extension or add-on.
