protected function _prepareMessage($email)
    {
        $lines = $email->message();
        $messages = [];
        foreach ($lines as $line) {
            if (!empty($line) && ($line[0] === '.')) {
                $messages[] = '.' . $line;
            } else {
                $messages[] = $line;
            }
        }

        return implode("\r\n", $messages);
    }