Swift_Transport_SmtpAgent::executeCommand PHP Method

    public function executeCommand($command, $codes = array(), &$failures = null);

 /**
  * Try to authenticate the user with $email and $token.
  *
  * @param Swift_Transport_SmtpAgent $agent
  * @param string                    $email
  * @param string                    $token
  *
  * @return bool
  */
 public function authenticate(Swift_Transport_SmtpAgent $agent, $email, $token)
 {
     try {
         $param = $this->constructXOAuth2Params($email, $token);
         $agent->executeCommand("AUTH XOAUTH2 " . $param . "\r\n", array(235));
         return true;
     } catch (Swift_TransportException $e) {
         $agent->executeCommand("RSET\r\n", array(250));
         return false;
     }
 }