@clacke I think you are right, it's the form - or more likely something behind the form that's sanitising the HTML. I haven't noticed this here before, probably because people don't sent in much HTML. Much of it is plain text or a Markdown variant which I process for them.
"I appreciate SDF but it's a general-purpose server and the name doesn't make it obvious that it's about art." - Eugen Rochko