Steps to correctly create form to sending emails in Codeigniter

Question

I'm trying recently to write a form for sending emails in codeigniter and it shows a problem with sending.

Failed to authenticate password. Error: 535-5.7.8 Username and Password not >accepted. Learn more at 535 5.7.8 https://support.google.com/mail/answer/14257 >2sm864121lja.37 - gsmtp Unable to send email using PHP SMTP. Your server might not be configured to >send mail using this method.

I'm using the same password as to gmail account. In php.ini I set:

sendmail_path = "\"E:\xampp\sendmail\sendmail.exe\" -t"

instead

;sendmail_path = "\"E:\xampp\sendmail\sendmail.exe\" -t"

and in sendmail.ini I set up a auth_username, auth_password, smtp_port and smtp_server.

it is my view(myform.php):

<?php echo validation_errors(); ?>
<?php $this->load->helper("form");
echo form_open('form'); ?>
<h5>Tytul</h5>
<input type="text" name="topic" value="<?php echo set_value('topic'); ?>"     
size="50" />
<h5>Text</h5>
<input type="text" name="text" value="<?php echo set_value('text'); ?>" 
size="50" />
<h5>Nick</h5>
<input type="text" name="username" value="<?php echo set_value('username'); 
?>" size="50" />
<h5>Email Address</h5>
<input type="text" name="email" value="<?php echo set_value('email'); ?>" 
size="50" />
<div><input type="submit" value="Submit" /></div>
</form> <?php echo $this->session->flashdata('msg'); ?>

It is my controller (form.php):

<?php
class Form extends CI_Controller
{
public function __construct()
{
    parent::__construct();
    $this->load->helper(array('form','url'));
    $this->load->library(array('session', 'form_validation', 'email'));
}

function index()
{
    //set validation rules
    $this->form_validation->set_rules('username', 'username', 'required|min_length[5]|max_length[12]');
    $this->form_validation->set_rules('email', 'Emaid ID', 'required|valid_email');
    $this->form_validation->set_rules('text', 'text', 'required');
    $this->form_validation->set_rules('topic', 'topic', 'required');

    //run validation on form input
    if ($this->form_validation->run() == FALSE)
    {
        //validation fails
        $this->load->view('myform');
    }
    else
    {
        //get the form data
        $name = $this->input->post('username');
        $from_email = $this->input->post('email');
        $subject = $this->input->post('topic');
        $message = $this->input->post('text');

        //set to_email id to which you want to receive mails
        $to_email = 'email@gmail.com';

        //configure email settings
        $config['protocol'] = 'smtp';
        $config['smtp_host'] = 'ssl://smtp.gmail.com';
        $config['smtp_port'] = '465';
        $config['smtp_user'] = 'email@gmail.com';
        $config['smtp_pass'] = 'password';
        $config['mailtype'] = 'html';
        $config['charset'] = 'iso-8859-1';
        $config['wordwrap'] = TRUE;
        $config['newline'] = "\r\n"; //use double quotes
        //$this->load->library('email', $config);
        $this->email->initialize($config);                        

        //send mail
        $this->email->from($from_email, $name);
        $this->email->to($to_email);
        $this->email->subject($subject);
        $this->email->message($message);
        if ($this->email->send())
        {
            // mail sent
            $this->session->set_flashdata('msg','<div class="alert alert-success text-center">Your mail has been sent successfully!</div>');
            redirect('form/index');
        }
        else
        {

            //error
          echo $this->email->print_debugger();
        }
    }
}


}
?>