* http://htmlemailboilerplate.com/

  * [[http://www.campaignmonitor.com/css/]]
  * [[http://habrahabr.ru/blogs/webdev/60420/|10 рекомендаций по html-верстке электронных писем]]
  * [[http://www.emailonacid.com/|Email on Acid]]  
  * [[http://www.email-standards.org/]]