Yeah, and there's a Perl Email::Valid http://search.cpan.org/~rjbs/Email-Valid-0.190/ http://search.cpan.org/~rjbs/Email-Valid-0.190/ which checks for well-form

Yeah, and there's a Perl Email::Valid http://search.cpan.org/~rjbs/Email-Valid-0.190/ http://search.cpan.org/~rjbs/Email-Valid-0.190/ which checks for well-formedness and the existence of the domain.