Welcome to the HTML Email Boilerplate. This website and its sample code creates a template of sorts, absent of design or layout, that will help you avoid some of the major rendering problems with the most common email clients out there — Gmail, Outlook, Yahoo Mail, etc. While not plug and play (you know, you’ll have to do some work ;-), it will provide some helpful examples and snippets that will keep your email design rendering as true-to-form as possible.
Here’s a terrific free tool with thoroughly commented code, to help you ensure your next email newsletter looks as gorgeous in Gmail as it does on Yahoo.
I love that people share this kind of knowledge.