используйте класс phpmailer. Вот пример кода для загрузки класса phpmailer goto http://sourceforge.net/projects/phpmailer/
require('./class.phpmailer/class.phpmailer.php');
if(isset($_GET['name'])&&isset($_GET['email'])&&isset($_GET['message']))
{
define('GUSER', 'youremail@gmail.com'); // GMail username
define('GPWD', 'yourgmailpass'); // GMail password
function smtpmailer($to, $from, $from_name, $subject, $body) {
global $error;
$mail = new PHPMailer(); // create a new object
$mail->IsSMTP(); // enable SMTP
$mail->SMTPDebug = 0; // debugging: 1 = errors and messages, 2 = messages only
$mail->SMTPAuth = true; // authentication enabled
$mail->SMTPSecure = 'ssl'; // secure transfer enabled REQUIRED for GMail
$mail->Host = 'smtp.googlemail.com';
$mail->Port = 465;
$mail->Username = GUSER;
$mail->Password = GPWD;
$mail->SetFrom($from, $from_name);
$mail->Subject = $subject;
$mail->Body = $body;
$mail->AddAddress($to);
if(!$mail->Send()) { echo 'error';}
else{echo 'message send';}
}
$name="sender : ".$_GET['email']."";
$message=$name."\n".$_GET['message'];
$subject="a Message from :".$_GET['name'];
smtpmailer('Destinationemail@yahoo.com', '', 'youremail@mail.com',$subject ,$message , $message);