PHP code สอบถามเรื่องโค้ดส่งเมล์ ​auto reply แบบอัตโนมัติครับ

$mail = new PHPMailer;

$mail->SMTPDebug = 0;                               // Enable verbose debug output
$mail->CharSet = "utf-8";
$mail->isSMTP();                                      // Set mailer to use SMTP
$mail->Host = 'xxx.xxx.xxx.xxx';  // Specify main and backup SMTP servers
$mail->SMTPAuth = true;                               // Enable SMTP authentication
$mail->Username = '[email protected]';                 // SMTP username
$mail->Password = 'XXXXXX';                           // SMTP password
//$mail->SMTPSecure = 'tls';                            // Enable TLS encryption, `ssl` also accepted
//$mail->Port = 25;                                    // TCP port to connect to

$mail->setFrom('[email protected]','Admin');

$mail->addAddress('[email protected]','Pjoe');