If you're not going to verify that the email address they're giving you is real, why restrict them to your idea of what goes in an address? I often fill in my email address as [email protected] . It's pretty easy to see that that's invalid -- to the best of my knowledge, there is no .fake TLD, and there certainly wasn't when I started doing it. But, I've never seen a form reject it.

You validate email addresses by sending confirmation emails. What's the thinking behind pretending you're doing it in the form?