Are you embedding an HTML table into an HTML style email? If so, you might want to heavily manage your expectations. Current email systems don't process email html like a browser does, and what they do accept is all over the place.
You can use this to test your email:
I've been down this road before and it didn't end well, mostly because it was hard for me to create the selectors needed to alternate row colors using CSS and HTML that the email clients would process.