Set up the crash reporter to send reports via email using SMTP

        :param host: SMTP host
        :param port: SMTP port
        :param user: sender email address
        :param passwd: sender email password
        :param recipients: list or comma separated string of recipients

def setup_smtp(self, host, port, user, passwd, recipients, **kwargs):
        """
        Set up the crash reporter to send reports via email using SMTP

        :param host: SMTP host
        :param port: SMTP port
        :param user: sender email address
        :param passwd: sender email password
        :param recipients: list or comma separated string of recipients
        """
        self._smtp = kwargs
        self._smtp.update({'host': host, 'port': port, 'user': user, 'passwd': passwd, 'recipients': recipients})
        try:
            self._smtp['timeout'] = int(kwargs.get('timeout', SMTP_DEFAULT_TIMEOUT))
        except Exception as e:
            logging.error(e)
            self._smtp['timeout'] = None
        self._smtp['from'] = kwargs.get('from', user)