Summary: Learn about support for the HTML and Cascading Style Sheets specification provided by Word 2007 and Outlook 2007. Word 2007 HTML and CSS Rendering Capabilities in Outlook 2007 (Part 2 of 2) provides instructions to install and use the Outlook 2007 Tool: HTML and CSS Validator. (24 printed pages)
More details see: http://msdn2.microsoft.com/en-us/library/aa338201.aspx and
http://msdn2.microsoft.com/en-us/bb226714.aspx