Q: Can we view message source?

Sometimes the easiest and fastest way to tell a phishing email from a legitimate one is to look at the raw HTML in a MIME email message. If the web site it sends you to is fishy, or if full headers show a message supposedly from eBay was routed through Croatia, it's a phish.

It's easy enough to do this in the desktop Apple Mail program, but so far I haven't figured out how to do this in Mail on an iPhone or iPad. Anybody know how to do this?