#!/usr/bin/perl
use Email::Valid;
print (Email::Valid->address('user@example.com') ? 'yes' : 'no');

#!/usr/bin/perl
use Mail::CheckUser qw(check_email last_check);

my $email = 'user@example.com';

if(check_email($email)) {
	print "E-mail address <$email> is OK\n";
} else {
	print "E-mail address <$email> isn't valid: ", last_check()->{reason}, "\n";
}

use Data::Validate::Email qw(is_email is_email_rfc822);

if(is_email($suspect)){
	print "Looks like an email address\n";
} elsif(is_email_rfc822($suspect)){
	print "Doesn't much look like an email address, but passes rfc822\n";
} else {
	print "Not an email address\n";
}