Untitled

$this->load->model('checkout/success');
$data['products'] = array();
$data['products'] = $this->model_checkout_success->getProducts($order_id);

unset($mail);
$mail = new Mail();
$mail->protocol = $this->config->get('config_mail_protocol');
$mail->parameter = $this->config->get('config_mail_parameter');
$mail->smtp_hostname = $this->config->get('config_mail_smtp_hostname');
$mail->smtp_username = $this->config->get('config_mail_smtp_username');
$mail->smtp_password = html_entity_decode($this->config->get('config_mail_smtp_password'), ENT_QUOTES, 'UTF-8');
$mail->smtp_port = $this->config->get('config_mail_smtp_port');
$mail->smtp_timeout = $this->config->get('config_mail_smtp_timeout');

foreach ($data['products'] as $product) {
  $data['text_greeting'] = $this->language->get('text_greeting');

  $mail->setTo($product['email']);
  $mail->setFrom($this->config->get('config_email'));
  $mail->setSender(html_entity_decode('testing sender', ENT_QUOTES, 'UTF-8'));
  $mail->setSubject(html_entity_decode('testing', ENT_QUOTES, 'UTF-8'));
  $mail->setHtml($this->load->view('mail/checkout', $data));
  $mail->send();
}

public function getProducts($order_id) {
  $this->language->load('checkout/success');
  $query = $this->db->query("SELECT DISTINCT u.email as email, u.shopname, u.user_id, o.order_id,
  CONCAT(oi.invoice_prefix_no,oi.invoice_order_no) as invoice FROM " . DB_PREFIX . "order o LEFT JOIN
  " . DB_PREFIX . "order_product op ON (op.order_id = o.order_id) LEFT JOIN " . DB_PREFIX . "user u ON
  (u.user_id = op.user_id) LEFT JOIN order_invoice oi ON (oi.order_id = o.order_id AND oi.user_id = u.user_id)
  WHERE o.order_id = '" . (int)$order_id . "'");
  return $query->rows;
}

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/1999/REC-html401-19991224/strict.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Order</title>
</head>
<body style="font-family: Arial, Helvetica, sans-serif; font-size: 12px; color: #000000;">
<div style="width: 680px;">
<p style="font-size:13px; margin-top: 0px; margin-bottom: 20px;"><?php echo $text_greeting; ?></p>
</div>
</body>
</html>