Im not exactly positive this is what you're looking for but i hope this code helps.
Email: <CFINPUT TYPE="Text" NAME="email"
MESSAGE="Email is improperly formatted">
P.S. I got this from the following link which has a detailed explanation of CFForm. Therefore that code is not mine just to make it clear it is Charlie Areharrts. http://www.sys-con.com/coldfusion/article.cfm?id=379&count=5104&tot=4&page=2