This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
HTML works for formatting mails (although many people severely dislike HTML mails), but I'm not sure you can (or should) take it as far using it for forms. You're better off putting a link into the mail that takes the user to a server where the form page is hosted.