I dislike every email client I've used. I dislike Tbird the least. If Tbird doesn't survive this transition, I've thought in the past of using something like M

I dislike every email client I've used. I dislike Tbird the least. If Tbird doesn't survive this transition, I've thought in the past of using something like Mutt, with <something> to display rendered html, and <something else> to compose html mail. And <yet another thing> for calendar access to my fastmail calendar. Any suggestions for any of those things?