SMTP邮件程序无法在codeigniter 3中运行

Question

Failed to authenticate password. Error: 535 Incorrect authentication data Unable to send email uenter code heresing PHP SMTP. Your server might not be configured to send mail using this method.

$config = Array(
  'protocol' => 'smtp',
  'smtp_host' => 'mail.******.com',
  'smtp_port' => 587,
  'smtp_user' => 'tracker@******.com', 
  'smtp_pass' => '7Wj{S******KU{', 
  'mailtype' => 'html',
  'charset' => 'iso-8859-1',
  'wordwrap' => TRUE
);

$message = 'Hiii';

       $this->load->library('email', $config);
        $this->email->set_newline("
");
        // $this->load->library('email');
      $this->email->from('tracker@******.com'); // change it to yours

      $this->email->to($usremail);// change it to yours 

      $this->email->cc('');
      // $this->email->bcc('gobinath@******.com');
      $this->email->subject('hi');

      $this->email->message($message);

      $mailsucc = $this->email->send();
    if ($mailsucc) {
        echo "suc";
    exit();
    }else{
    $de = $this->email->print_debugger();
    print_r($de);
    exit();
    }