Thunderbird to text? Sure: https://www.google.com/search?q=Thunderbird+export+all+mail+to+text&gl=US
Don't even know if such a product exists but if it does I would like to know what it's called and if there is a free version. Over the years I have accumulated tons of emails between myself and certain people but have not deleted it because I have always planned on copying the content and pasting it into a Word file that I can look back on. Of course, that is extremely time-consuming. Wondering if there is something that can go into emails from a certain contact for instance, pull out all the content, allow me to copy it, so that I can delete all those emails.