I'm generating a html email that uses an internal stylesheet, i.e.
<!doctype html>
<html>
<head>
<style type="text/css">
h2.foo {color: red}
</style>
</head>
<body>
<h2 class="foo">Email content here</foo>
</body>
</html>
When viewed in Gmail it seems all the styles in the internal stylesheet are ignored. It seems Gmail ignores all styles other than inline rules, e.g.
<h2 style="color: red">Email content here</foo>
Is this my only option for styling HTML emails when viewed with Gmail?
Use inline styles for everything. This site will convert your classes to inline styles: http://premailer.dialect.ca/