How to use the rss2email.SMTPConnectionError function in rss2email

if config is None:
        config = CONFIG
    server = CONFIG.get(section, 'smtp-server')
    LOG.debug('sending message to {} via {}'.format(recipient, server))
    ssl = CONFIG.getboolean(section, 'smtp-ssl')
    if ssl:
        smtp = _smtplib.SMTP_SSL()
    else:
        smtp = _smtplib.SMTP()
        smtp.ehlo()
    try:
        smtp.connect(SMTP_SERVER)
    except KeyboardInterrupt:
        raise
    except Exception as e:
        raise SMTPConnectionError(server=server) from e
    if CONFIG.getboolean(section, 'smtp-auth'):
        username = CONFIG.get(section, 'smtp-username')
        password = CONFIG.get(section, 'smtp-password')
        try:
            if not ssl:
                smtp.starttls()
            smtp.login(username, password)
        except KeyboardInterrupt:
            raise
        except Exception as e:
            raise SMTPAuthenticationError(server=server, username=username)
    smtp.send_message(message, sender, [recipient])
    smtp.quit()

def __init__(self, server, message=None):
        if message is None:
            message = 'could not connect to mail server {}'.format(server)
        super(SMTPConnectionError, self).__init__(message=message)
        self.server = server

    def log(self):
        super(SMTPConnectionError, self).log()
        LOG.warning(
            'check your config file to confirm that smtp-server and other '
            'mail server settings are configured properly')
        if hasattr(self.__cause__, 'reason'):
            LOG.error('reason: {}'.format(self.__cause__.reason))


class SMTPAuthenticationError (SMTPConnectionError):
    def __init__(self, server, username):
        message = (
            'could not authenticate with mail server {} as user {}'.format(
                server, username))
        super(SMTPConnectionError, self).__init__(
            server=server, message=message)
        self.server = server
        self.username = username


class SendmailError (RSS2EmailError):
    def __init__(self, status=None, stdout=None, stderr=None):
        if status:
            message = 'sendmail exited with code {}'.format(status)
        else:
            message = ''

def log(self):
        super(SMTPConnectionError, self).log()
        LOG.warning(
            'check your config file to confirm that smtp-server and other '
            'mail server settings are configured properly')
        if hasattr(self.__cause__, 'reason'):
            LOG.error('reason: {}'.format(self.__cause__.reason))