Bu şekilde bir dene

<?

/************************
* Variables you can change
*************************/

$mailto = "info@site.com";
$cc = "";
$bcc = "";
$subject = "Email Konusu";
$vname = "Web Sitesinden Gelen";


/************************
* do not modify anything below unless you know PHP/HTML/XHTML
*************************/


$email = $_POST['email'];

function validateEmail($email)
{
   if(eregi('^[a-zA-Z0-9._-]+@[a-zA-Z0-9-]+\.[a-zA-Z]{2,4}(\.[a-zA-Z]{2,3})?(\.[a-zA-Z]{2,3})?$', $email))
      return true;
   else
      return false;
}


if((strlen($_POST['name']) < 1 ) || (strlen($email) < 1 ) || (strlen($_POST['message']) < 1 ) || validateEmail($email) == FALSE){
    $emailerror .= 'Hata:';

    if(strlen($_POST['name']) < 1 ){
        $emailerror .= '<li>Adınızı Giriniz</li>';
    }

    if(strlen($email) < 1 ){
        $emailerror .= '<li>Email Giriniz</li>';
    }

    if(validateEmail($email) == FALSE) {
        $emailerror .= '<li>Email Adresi Geçersiz</li>';
    }

    if(strlen($_POST['message']) < 1 ){
        $emailerror .= '<li>Mesajınızı Yazınız</li>';
    }

} else {

    $emailerror .= "Mesajınız Başarıyla Gönderildi";



    // NOW SEND THE ENQUIRY

    $timestamp = date("F j, Y, g:ia");

    $messageproper ="\n\n" .
        "Name: " .
        ucwords($_POST['name']) .
        "\n" .
        "Email: " .
        ucwords($email) .
        "\n" .
        "Comments: " .
        $_POST['message'] .
        "\n" .
        "\n\n" ;
$basliklar  = "MIME-Version: 1.0" . "\r\nContent-type: text/html; charset=iso-8859-9"."\r\nFrom: ".$vname." <".$_POST['e_mail'].">"."\r\nReply-To: \"".ucwords($_POST['first_name'])."\" <".$_POST['e_mail'].">" ."\nX-Mailer: PHP/".phpversion();

        $messageproper = trim(stripslashes($messageproper));
        mail($mailto, $subject, $messageproper,$basliklar);

}
?>

<div id='emailerror'>
    <ul>
        <? echo $emailerror; ?>
    </ul>
</div>