Evan that's cool. How do you get the DNS server name of the submitted email address? Also in their product info they say this:

"EmailScreen works by performing a special type of a DNS lookup.
This lookup ensures that the domain of the email address is
qualified to receive mail. Although it is impossible for validation to be
100% foolproof, EmailScreen can reduce the bad email addresses
in your database by up to 50%!"

So I guess you could have an invalid email address with a valid DNS that accepts mail. Is the only way known now to verify email addresses be actually emailing a submitted address and test the result? Heh I suppose if some type of valid addresses list were available from a Mail server we would definately have unending spam.

>"A web site developer need only feed EmailScreen a DNS server and an email address; EmailScreen will return a true or false, based upon the results of testing."
>
>http://www.xpresspress.com/news/emailscreen_082800.html