Email and Responsive Design

http://i3.campaignmonitor.com/assets/files/css/campaign-monitor-guide-to-css-in-email-sep-2013V2.pdf?ver=2232&_ga=1.78269076.1283559856.1396942791

http://www.campaignmonitor.com/blog/post/3442/mobile-email-design-in-practice/

http://www.campaignmonitor.com/blog/post/3457/media-query-issues-in-yahoo-mail-mobile-email/