A family member of mine will be moving in the coming months and will no longer have access to her ISP email. She wants to backup a few hundred emails and store them locally so she can read them whenever she wants. I was thinking the best solution is to use Thunderbird, download all the emails and export them. But maybe there is a better way now?
I think Thunderbird isn’t a bad decision to backup emails. Moreover, if your family member will create a new email account, he can also try to install different add-ons like this one you can check here. It helps to simplify email sending, especially when you have a business. You can send emails instantly converting into text messages, with all replies then arriving as emails.