use strict;
use warnings;

use Net::Telnet;

my $tel = Net::Telnet->new(-host => 'localhost', -port => 25, -errmode => 'return') 
     or die "Port not available\n";
my $rtn = $tel->getline() 
     or die "No Reponse\n";
print $rtn =~ /^2\d\d .*SMTP/ ? 'OK' : 'Fail';