ใช้ PHPMailer แล้วเมลเข้ามาซ้ำกันค่ะ เป็นเฉพาะบางอีเมลเท่านั้น รบกวนด้วยนะคะ T^T

<?
session_start();
require_once('PHPMailer_5.2.4/class.phpmailer.php');
error_reporting(E_STRICT);

$regis_email = strtolower($regis_email);
$find_str = ' SELECT * FROM customer WHERE email = "'.$regis_email.'" ';
$find_qry = $conn->query($find_str);

if (mysqli_num_rows($find_qry) > 0 ) {
   header("Location: index.php?existEmail&ref=".$regis_adsRef." ");
} else {
   $num_str = sprintf("%06d", mt_rand(1, 999999));
   $body  = " <strong>คุณ ".$regis_name."</strongลงทะเบียนรับสิทธิพิเศษ<br><br>
            *** <u>รหัส</u>: <strong style='font-size:14px; color:#fc0000;'>".$num_str."</strong>";
    
   $mail             = new PHPMailer();					
   $mail->CharSet = "utf-8";
   $mail->IsSMTP(); 
   $mail->Host       = "outlook.office365.com"; 
    
   $mail->SMTPAuth = true;
   $mail->Host       = "outlook.office365.com"; 
   $mail->Port       = 587;                // set the SMTP port
   $mail->SMTPSecure = 'tls';  
   $mail->Username = "[email protected]";
   $mail->Password = "xxx";
    
    
   $mail->SetFrom("[email protected]", "Customer Register");
   $mail->AddReplyTo("[email protected]", "Customer Register");
   $mail->Subject    = "คุณ".$regis_name." ลงทะเบียนรับสิทธิพิเศษ";
    
   $mail->MsgHTML($body);
    
   $email_list = array(		"[email protected]", "[email protected]", "[email protected]" );										
   foreach($email_list as $key=>$value) {
      $mail->AddAddress($value,$value);
   }
    
    //=== BCC ===//
    $dev_emails = array("[email protected]","[email protected]"); 
    foreach($dev_emails as $key2=>$value2) {
        $mail->AddBCC($value2, $value2);
    }
    
   $status = $mail->Send();
   if(!$status) {
      echo "Mailer Error: " . $mail->ErrorInfo;
   } else {
      insert into DB.
   }
}
?>