$gonder_isim="Gönderen İsmi";
$gonder_mail="Gönderen Mail";
$alan_isim="Alıcı İsim";
$alan_mail="Alıcı Mail";
$baslik="Konu";
$mesaj="Mesajınız";

$mailtanim = "MIME-Version: 1.0\r\n";
$mailtanim .= "Content-type: text/plain; charset=iso-8859-9\r\n";
$mailtanim .= "From: $name <$gonder_mail>\r\n";
$mailtanim .= "Reply-To: $name <$gonder_mail>\r\n";

mail($alan_mail,$baslik,stripslashes($mesaj),$mailtanim);
//kolay gelsin :)