SlightPHP\PHPMailer::ServerHostname PHP Method

    private function ServerHostname()
    {
        if (!empty($this->Hostname)) {
            $result = $this->Hostname;
        } elseif (isset($_SERVER['SERVER_NAME'])) {
            $result = $_SERVER['SERVER_NAME'];
        } else {
            $result = "localhost.localdomain";
        }
        return $result;
    }