kirim email pake smtp

<?php
require_once("Mail.php");
    require_once('Mail/mime.php');
$recipients =  "gundambison@gmail.com";
    $headers["From"] = 'noreply@xxxx.com';
    $headers["Return-Path"] = 'noreply@xxxx.com';
    $headers["To"] = "xxxxx@gmail.com";
    $headers["Subject"] = "menerima order pemesanan";

$mime = new Mail_mime($crlf);
        $mime->setHTMLBody($pesan);
        $body = $mime->get();
        $header  = $mime->headers($headers);

    $smtpinfo["host"] =  "mail.xxxxx.com";
    $smtpinfo["port"] = "25";
    $smtpinfo["auth"] = true;
    $smtpinfo["username"] = "noreply@xxxxx.com";
    $smtpinfo["password"] = "xxxx";

    $mail_object =& Mail::factory("smtp", $smtpinfo);
$mail_object->send($recipients, $header, $body);