If by "formatting paragraphs" you mean putting line breaks in paragraphs, that's a losing battle. There is always a screen size where that's broken. There shoul

If by "formatting paragraphs" you mean putting line breaks in paragraphs, that's a losing battle. There is always a screen size where that's broken. There should be no line breaks, and viewer should wrap the text as needed. This is what HTML renderers are great at. Basically HTML is perfect for email, and the only reason plain text email exists is that it was invented before html.