My email is being sent to spam but not to inbox in code igniter

Question

This code is working fine but mails are going to spam folder instead of inbox.

public function get_in_touch_always(){

$this->_Creating_get_in_touch_always();
    if ($this->form_validation->run() === TRUE){
        $data = array();
        $data['name'] = $_POST['name'];
        $data['email'] = $_POST['email'];
        $data['phone'] = $_POST['mobile'];
        $data['message'] = $_POST['message'];
        //$data['charges'] = $_POST['charges'];
        $data['upload_date'] = date("d M Y");
        $data['upload_time'] =  date("h:i a");    
    if ($this->b->insert_in_touch_always($data)) {
    $this->load->library('email');
    $config['protocol']='smtp';
    $config['smtp_host']='xxx.com';
    $config['smtp_port']='465';
    $config['smtp_timeout']='60';
    $config['smtp_user']='xxx@yy.com';
    $config['smtp_pass']='xxx';
    $config['charset']='utf-8';
    $config['newline']="\r\n";
    $config['crlf']="\r\n";
    $config['wordwrap'] = TRUE;
    $config['mailtype'] = 'html';
    $this->email->initialize('email',$config);
    $this->email->from('xxx@yy.com', 'xxx');
    $this->email->to('yyyy');
    $this->email->bcc('zzz@gmail.com');       
    $this->email->subject('Notification Mail');
    $this->email->message('Hie world');
    if($this->email->send()){
        echo "Sent";
    }else{
        echo "fail";
    }
    die();
    echo "ok sent";
    show_error($this->email->print_debugger());                   
            $this->outputData['error'] = 'Successfully Your Query is Created';
        } else {
            $this->outputData['error'] = 'Failed To Insert';
        }
    } else {
        $this->outputData['error'] = validation_errors();
    }
    $this->load->view('thanku', $this->outputData);
}
}

Please let me know the solution for this. I am getting the mails but it is still going to spam folder. Is there anything to be added for this?