Petition text follows, discussion welcomed :)<p>Every email client in the world except Gmail (yes, including Outlook) supports, to some extent, CSS in tags in the head section of HTML emails. Gmail is the only client in the world that does not, and only supports inline CSS.<p>As such, while being a very popular client both on the Web and on Android devices, Gmail forces anyone who wants to send HTML emails to try and find workarounds, in order for emails they send to look good across all clients and devices. In effect though, there's no real solution for sending an email that looks good across all devices, while not resorting to very small-fixed-width emails, if you wish them to look good (and then making them not look good on big screens, Web and desktop clients).<p>And while other clients have their quirks (like Outlook using Word rendering engine), almost everything is possible to achieve with them, including responsive HTML email designs, because they support CSS in the head section of the HTML. Just as a comparison, iOS supports CSS to a maximum degree, including media queries, a fact which makes email templates easy to code and handle, and brilliant to view across iOS devices.<p>I hereby call upon Google to get with the program, and start supporting non-inlined CSS in emails. If AOL and Yahoo can do it, you can too.