php smtp mail gondermiyor

<?phpclass Email_model extends CI_Model {        function send_email($email_to, $subject, $message){        if ($this->settings->mail_protocol == 'smtp') {
            $config = array(                'protocol' => 'smtp',                'smtp_host' => $this->settings->mail_host,                'smtp_port' => $this->settings->mail_port,                'smtp_user' => $this->settings->mail_username,                'smtp_pass' => base64_decode($this->settings->mail_password),                'mailtype'  => 'html',                 'charset'   => 'iso-8859-1'            );            $this->load->library('email', $config);            $this->email->set_newline("\r\n");            $this->email->from($this->settings->admin_email, $this->settings->site_name);            $this->email->to($email_to);            $this->email->subject($subject);            $this->email->message($message);
            // Set to, from, message, etc.            $result = $this->email->send();            if(!$result){                //echo $this->email->print_debugger();                return false;            }else{                //echo 'Message has been sent';                return true;            }

        } else {            $this->load->library('email');            $this->load->library('encryption');            $this->email->set_mailtype('html');                        $this->email->from($this->settings->admin_email, $this->settings->site_name);            $this->email->to($email_to);            $this->email->subject($subject);            $this->email->message($message);            $this->email->send();            if($this->email->send()){               //Success email Sent               return true;            }else{               //Email Failed To Send               return $this->email->print_debugger();            }        }    }
}