What is the UIElement of the iOS's mail client?

Question

As you can see the iOS Mail client can see some rich emails, so, it seems that it is not a TextArea, what is the Mail Client using? A UIWebView? or something custom make? Thanks.

Answer 1

Emails contain HTML content, which is always rendered in a WebView no matter what modern email client you use, so yes, it is a UIWebView.

Answer 2

It can not be any default UIElement. I think it is a customised view