If you’re still coding HTML emails by hand… I’m sorry. But hey, I feel your pain having gone through many hours on this email template. This article talks about a quirk with Outlook.com on IE9 and how to overcome it.
These days it’s possible to hold a smartphone in your hand with a higher screen resolution than a computer. This can pose a small issue when using media queries since there are a few devices that can fit in your hand, but actually have way more pixels than your mobile design width.An excerpt from How to use the right media queries in HTML email