For Devs: A Fix for Gmail’s iOS App Font Size Increase http://freshinbox.com/blog/gmail-on-ios-increases-font-size-on-some-emails/
Gallery of Common Outlook Rendering Issues http://freshinbox.com/blog/gallery-of-outlook-rendering-issues/
9 Tricks to Design The Perfect HTML Newsletter http://www.hongkiat.com/blog/design-perfect-newsletter/
Will There Ever be an Email Standard? http://www.emaildesignreview.com/html-email-coding/will-there-ever-be-an-email-standard-2707/
Six Great Responsive Email Designs http://blog.lyris.com/email-inspiration-six-great-responsive-email-designs/