Method ehlo

Lib/smtplib.py:452–501

SMTP 'ehlo' command. Hostname to send for this command defaults to the FQDN of the local host.

(self, name='')

        return (code, msg)

    def ehlo(self, name=''):
        """ SMTP 'ehlo' command.
        Hostname to send for this command defaults to the FQDN of the local
        host.
        """
        self.esmtp_features = {}
        self.putcmd(self.ehlo_msg, name or self.local_hostname)
        (code, msg) = self.getreply()
        # According to RFC1869 some (badly written)
        # MTA's will disconnect on an ehlo. Toss an exception if
        # that happens -ddm
        if code == -1 and len(msg) == 0:
            self.close()
            raise SMTPServerDisconnected("Server not connected")
        self.ehlo_resp = msg
        if code != 250:
            return (code, msg)
        self.does_esmtp = True
        #parse the ehlo response -ddm
        assert isinstance(self.ehlo_resp, bytes), repr(self.ehlo_resp)
        resp = self.ehlo_resp.decode("latin-1").split('\n')
        del resp[0]
        for each in resp:
            # To be able to communicate with as many SMTP servers as possible,
            # we have to take the old-style auth advertisement into account,
            # because:
            # 1) Else our SMTP feature parser gets confused.
            # 2) There are some servers that only advertise the auth methods we
            #    support using the old style.
            auth_match = OLDSTYLE_AUTH.match(each)
            if auth_match:
                # This doesn't remove duplicates, but that's no problem
                self.esmtp_features["auth"] = self.esmtp_features.get("auth", "") \
                        + " " + auth_match.groups(0)[0]
                continue

            # RFC 1869 requires a space between ehlo keyword and parameters.
            # It's actually stricter, in that only spaces are allowed between
            # parameters, but were not going to check for that here.  Note
            # that the space isn't present if there are no parameters.
            m = re.match(r'(?P<feature>[A-Za-z0-9][A-Za-z0-9\-]*) ?', each)
            if m:
                feature = m.group("feature").lower()
                params = m.string[m.end("feature"):].strip()
                if feature == "auth":
                    self.esmtp_features[feature] = self.esmtp_features.get(feature, "") \
                            + " " + params
                else:
                    self.esmtp_features[feature] = params
        return (code, msg)

    def has_extn(self, opt):
        """Does the server support a given SMTP service extension?"""