How to re-instate emails to Thunderbird from a profile backup?

Question

I have had to reinstall Windows 7. I saved the email folder \AppData\Roaming\Thunderbird\Profiles\yg3frwjm.default before doing so.

Now, how do I integrate the mails in this folder to newly created email accounts?

Answer 1

It's covered in this extensive FAQ on the mozillazine site.

Misread, so you have a new profile and want to copy the old stuff in? Same document, but different section, specific link.

Which eventually goes here.

Which says,

The simplest way to migrate your mail is to copy Mail and ImapMail (and their sub directories) to the top directory in the new profile, overwriting the existing ones. See Empty folders if it doesn't work.

However, the safest way is to use the ImportExportTools extension to import whatever folders you want to keep. When you run the menu command, it gives you the option of selecting a directory and having it find and select all of the folders in that directory and its subdirectories. See Importing folders for how to install and use that extension.