I came here to say exactly this. It's even harder for the real right-to-left use in the ones I speak, where we frequently mix Hebrew/Arabic with English, for u

I came here to say exactly this. It's even harder for the real right-to-left use in the ones I speak, where we frequently mix Hebrew/Arabic with English, for using certain words that just don't exist. Plaintext mailers completely mangle emails like this, making them beyond unreadable. Mutt to its credit does the best job.