เขียน code ส่งค่าอีเมล์ยังไงครับ ถ้ามีค่า smtp sever มาด้วย

$position=$_POST['position'];
$uploadfile=$_POST['uploadfile'];
$money=$_POST['money'];
$name=$_POST['name'];
$name=$_POST['name2'];
$gender=$_POST['gender'];
$tel=$_POST['tel'];
$your_email=$_POST['your_email'];
$status=$_POST['status'];
$address=$_POST['address'];
$province=$_POST['province'];
$city=$_POST['city'];
$provice_reg=$_POST['provice_reg'];
$religion=$_POST['religion'];
$nationality=$_POST['nationality'];
$race=$_POST['race'];


$boundary = md5(uniqid(time()));
$header = "From: " . $_POST['your_email'] . "\n";
$header .= "Content-Type: multipart/mixed; boundary=$boundary\n";
$headers = "Return-Path: $from\r\n";
$headers .= "X-Sender: $from\n";
$headers .= "From: $from\n";
$headers .= "X-Mailer:PHP 5.1\n";
$headers .= "MIME-Version: 1.0\n";
$headers .= "Content-Type: text/plain; charset=utf-8\n";
$headers .= "Content-Transfer-Encoding: 8bit\n\n";
 
$subject .= "Content-Type: text/plain; charset=utf-8\n";
$subject .= "Content-Transfer-Encoding: 8bit\n\n";
$subject .= "Content-Type: multipart/mixed; boundary=$boundary\n";
 
$body = "--$boundary\n";
$body .= "Content-Type: text/plain; charset=utf-8\n";
$body .= "Content-Transfer-Encoding: 8bit\n\n";

$body .= "ข้อมูลส่วนตัวของผู้สมัคร\n";
$body .= "สมัครตำแหน่ง : "."". $_POST['position'] . "\n";
$body .= "เงินเดือนที่ต้องการ : "."". $_POST['money'] . "\n";
$body .= "ชื่อ - นามสกุล : "."". $_POST['name'] . "\n";
$body .= "Name - Surname : "."". $_POST['name2'] . "\n";
$body .= "เพศ : "."". $_POST['gender'] . "\n";
$body .= "เบอร์โทรศัพท์บ้าน : "."". $_POST['tel'] . "\n";
$body .= "เบอร์โทรศัพท์มือถือ : "."". $_POST['tel2'] . "\n";
$body .= "อีเมล์ : "."". $_POST['your_email'] . "\n";
$body .= "สถานภาพสมรส : "."". $_POST['status'] . "\n";
$body .= "ที่อยู่ปัจจุบัน : "."". $_POST['address'] . "\n";
$body .= "แขวง / ตำบล : "."". $_POST['province'] . "\n";
$body .= "เขต / อำเภอ : "."". $_POST['city'] . "\n";
$body .= "จังหวัด : "."". $_POST['provice_reg'] . "\n";
$body .= "ศาสนา : "."". $_POST['religion'] . "\n";
$body .= "เชื้อชาติ : "."". $_POST['nationality'] . "\n";
$body .= "สัญชาติ : "."". $_POST['race'] . "\n";
$body .= "--$boundary--";

$to =  "[email protected]"	;
$subject = "Apply XXX Solution "."/"."$name2";

 if (mail($to, $subject, $body, $header)) {
 echo"<center><br> ส่งใบสมัครงานเรียบร้อยแล้วครับ</center>";
 }
  else {
 echo"<center><br>ส่งใบสมัครงานไม่ผ่าน <br> รอสักครู่.......</center>";
 }