So I have Thunderbird set to autosave every 5 mins. I was drafting an email, where I had written quite a lot of text (as a reply) and for some reason my text went missing and there was no undo in edits So I quit and went to drafts, nothing there. I checked and autosave is on for 5 mins. hit reply again. typed in some text, set a timer for 12 mins, quit. Again, no save. So why is "Auto Save ever " x mins not working?