When compiling a HMTL Layouts for email campaigns, be aware of the limitations that some Email Clients can cause to your HTML  and CSS layout.  Nutting out what IS and IS NOT supported is important when you're at the point of creating your template. 

FURTHER READING & HELP

http://www.campaignmonitor.com/css/ 
Shows and excellent chart and PDF version for download on some of the most popular email clients from Outlook to GMail. 

Article from Andy Thorpe as Guest Comment ( www.Pure360.com)  great checks you can make to ensure you email marketing will display correctly - Rendering, Testing, Checklist.  read more