what is error | Warning: mail() [function.mail]:

[dwightblackwell]

Message after form submit

Warning: mail() [function.mail]: SMTP server response: 500 localhost Address Error in C:\Program Files\Abyss Web Server\htdocs\contact\send.php on line 56


send.php
<?php
$to = "localhost"; // change to your email address
$name = $_POST['name'];
$email = $_POST['email'];
$subject = $_POST['subject'];
$msg = $_POST['msg'];
$d = date('l dS \of F Y h:i:s A');
$sub = "form to mail";
$headers = "From: $name <$email>\n";
$headers .= "Content-Type: text/plain; charset=iso-8859-1\n";
$mes = "Subject: ".$subject."\n";
$mes .= "Message: ".$msg."\n" ;
$mes .= "Name: ".$name."\n";
$mes .= 'Email: '.$email."\n";
$mes .= 'Date & Time: '.$d;

if (empty($name) || empty($email) || empty($subject) || empty($msg))
{
echo " <h3>Sorry all fields are required.</h3>";
}
elseif(!ereg("^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$", $email)) {
print " <h3>Sorry the email address you entered looks like it's invalid.</h3>";
}
else
{
mail($to, $sub, $mes, $headers);
print " <h3><center>Thank you ".$name." for contacting us.<br>We will get back to you as soon as posiable</center></h3>";
}
?>

Please help me

[dwightblackwell]

i fixed it sorry