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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def lhlo(self):
 """ Send LMTP LHLO greeting, and process the server response. A regular LMTP greeting is sent, and if accepted by the server, the capabilities it returns are parsed. DLMTP authentication starts here by announcing the dlmtp_ident in the LHLO as our hostname. When the ident is accepted and DLMTP mode is enabled (dspam.conf: ServerMode=dspam|auto), the DSPAMPROCESSMODE capability is announced by the server. When this capability is detected, the <DspamClient>.dlmtp flag will be enabled. """

        if self.dlmtp_ident is not None:
            host = self.dlmtp_ident
        else:
            host = socket.getfqdn()
        self._send('LHLO ' + host + '\r\n')

        finished = False
        while not finished:
            resp = self._read()
            if not resp.startswith('250'):
                raise DspamClientError(
                    'Unexpected server response at LHLO: ' + resp)
            if resp[4:20] == 'DSPAMPROCESSMODE':
                self.dlmtp = True
                logger.debug('Detected DLMTP extension in LHLO response')
            if resp[3] == ' ':
                # difference between "250-8BITMIME" and "250 SIZE"
                finished = True