I was visiting www.2advanced.com (Flash site) and I was amazed by the email validation script they use.
What the script does is it processes the email (sends some kind of proxy to the email address to see if it exists) and if it doesn't it displays Invalid Email Address (not just an email syntax verifier - it actually verifies the email actually exists). Now, I haven't seen it done in html/asp but was hoping some of you knew how to do it.
I am aware of the email validators available around but there is nothing close to what the 2advanced script can do. Very impressed, hope you can share your thoughts if you have the solution.