This newsletter example shows how email can adapt to the device on which they're being viewed to give the best customer experience on a desktop or mobile client. To see how this works, view this page on Firefox, Chrome, Opera or in IE9. Then decrease your browser window width. As you decrease the width to be very narrow, so its like viewing on a small mobile display, then before your eyes the magic occurs and the email changes to make best use of the display size. Alternatively, view this page on your iPhone or Android phone and compare with viewing on your desktop computer. We did this by using media queries.