CSS Guide for email clients

Designing an HTML email that renders consistently across the major email clients can be very time consuming. Support for even simple CSS varies considerably between clients, and even different versions of the same client.
CSS is limited by the popular email clients, for a list of which browsers do and don’t support what visit website.
You can download the table chart as pdf at the website.
Read more here: http://www.campaignmonitor.com/css/