Send Email With Mandrill

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class Guestbook extends CI_Controller {

   /**
    * ----------------------------------------------------------------------
    * Method   __construct()
    * @return  void
    * @access  public
    * ----------------------------------------------------------------------
    */
    public function __construct()
    {
        parent::__construct();
        date_default_timezone_set('Asia/Jakarta');
    }

    //on
    public function send_emailx()
    {
        $to = "coba@gmail.com";//need to change
        $subject = "Email subjet here";
        $from_name = "4 Rapid Development";
        $from_email = "no-reply@4rapiddev.com";

        $body = "";
        $body .= "Hi,<br>";
        $body .= "How are you?<br><br>";
        $body .= "<a href='http://4rapiddev.com'>4rapiddev.com</a>";

        $this->load->library('email');

        $config['charset'] = 'utf-8';
        $config['mailtype'] = 'html';
        $config['wordwrap'] = TRUE;
        $config['protocol'] = 'smtp';
        $config['smtp_port'] = '587';//need to change; Mandrill: 587
        $config['smtp_host'] = 'smtp.mandrillapp.com';//need to change; Mandrill: smtp.mandrillapp.com
        $config['smtp_user'] = "psb.bukhari@gmail.com";//need to change
        $config['smtp_pass'] = "eolzZHCxlAr4DdA3MZehyg";//need to change
        $config['smtp_timeout'] = "30";

        $this->email->initialize($config);

        $this->email->from('no-reply@4rapiddev.com', '4 Rapid Development');
        $this->email->to($to);
        $this->email->subject($subject);
        $this->email->message($body);

        //$this->email->send();
        if (!$this->email->send()){
          show_error($this->email->print_debugger());
        }else{ echo 'YEAH!!!';}
    }
}