My sentiments are totally with this comment, however as others have pointed out you can deliver both via plaintext fallback And in defense of html emails: for

My sentiments are totally with this comment, however as others have pointed out you can deliver both via plaintext fallback And in defense of html emails: for marketing missions there's nothing like a nice piece of visual design -- layout, color, possibly some type design, but not necessarily images since folks like me turn them off because of tracking -- to get attention and drive interest. Also, html can allow for column layout that could keep email content shorter than plain text version