send mail by codeigniter

######################## CONTROLERS : MAIL.php ####################################
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
    class Mail extends CI_Controller {
        private $datauser;
        public function __construct() {
            parent::__construct();
            if ($this->session->userdata('isLogin') == false){
                redirect('login/login_form');
            }
            $this->load->library('parser');
            $this->load->helper(array('url','html','form'));
            $this->datauser = $this->session->userdata('data_user');
        }

        public function index(){
            $data = array(
            'main_view' => 'contacts'
            , 'judulpages' => 'JUDUL PADA TAG TITLE'
            );
            //$this->parser->parse('template/f/templatecontact', $data);
            $this->load->view('vsendmail',$data);
        }

        public function sendmessage(){
            $sender_email = $_REQUEST['email'];
            $sender_name = $_REQUEST['author'];
            $sender_subject = $_REQUEST['subject'];
            $sender_msg = $_REQUEST['text'];
            $recepient_email = 'cahyadyazin@yahoo.com'; //diperlukan
            $recepient_cc = ''; //optional, bisa dikosongkan
            $recepient_bcc = ''; //optional, bisa dikosongkan

            $this->load->library('email'); // mengambil library email, untuk fungsi-fungsi email
            $this->load->library('parser'); // digunakan jika kita menggunakan metode templating
            $data = array(); // parameter yang akan dilemparkan ke view untuk isi/content

            $this->email->from($sender_email, $sender_name); // inisialisasi pengirim yang didapat dari Form
            $this->email->to($recepient_email); // email penerima

            if($recepient_cc != ''){
            $this->email->cc($recepient_cc);
            }
            if($recepient_bcc != ''){
            $this->email->bcc($recepient_bcc);
            }
            if ( ($sender_email =='') || ($sender_name == '') || ($sender_subject == '') || ($sender_msg == '') ){
            $data = array('main_view' => 'contacts', 'judulpages' => 'JUDUL PADA TAG TITLE','hasil'=>'false');
            }else{
            $this->email->subject($sender_subject);
            $this->email->message($sender_msg);

            if ($this->email->send()){ //proses pengiriman email
            $data = array('main_view' => 'contacts', 'judulpages' => 'JUDUL PADA TAG TITLE PADA TEMPLATE','hasil'=>'true');
            }
            }
            //echo $this->email->print_debugger(); -> digunakan jika kita ingin mengetahui detail pengiriman, mungkin bisa dikatakan resi :))
            $this->load->view('vsendmail_ok.php');
        }
    }
?>


###################################### VIEW : VSENDMAIL.php #################################
<?php if (isset($hasil)){
if ($hasil == 'true'){
echo 'Berhasil';
}else{
echo 'Terjadi Kegagalan';
}
}
//variable ini digunakan jika kita ingin menge-set kembali nilai default menggunakan pengirim yang sama
$author = (isset ($_POST['author'])==true ? $_POST['author'] : '');
$email = (isset ($_POST['email'])==true ? $_POST['email'] : '');
$subject = (isset ($_POST['subject'])==true ? $_POST['subject'] : '');
$text = (isset ($_POST['text'])==true ? $_POST['text'] : '');
?>

<form method="post" name="contact" action="<?php echo site_url('mail/sendmessage');?>">
<label for="author">Name:</label> <input value="<?php echo $author; ?>" type="text" id="author" name="author" class="required input_field" />
<label for="email">Email:</label> <input value="<?php echo $email; ?>" type="text" id="email" name="email" class="validate-email required input_field" />

<label for="subject">Subject:</label> <input value="<?php echo $subject; ?>" type="text" name="subject" id="subject" class="input_field" />
<label for="text">Message:</label> <textarea id="text" name="text" id="text" rows="0" cols="0" class="required"><?php echo $text; ?></textarea>

<br />
<input type="submit" class="submit_btn" name="submit" id="submit" value="Send" />
<input type="reset" class="submit_btn" name="reset" id="reset" value="Reset" />

</form>

#################################### VIEW : VSENDMAIL_ok.php ##########################
<h1>Email Terkirim</h1>
<h2><a href="<?php echo site_url('mail');?>">Back</a></h2>