(self, host='', port=0, local_hostname=None,
                 timeout=socket._GLOBAL_DEFAULT_TIMEOUT,
                 source_address=None)
Initialize a new instance.

        If specified, `host` is the name of the remote host to which to
        connect.  If specified, `port` specifies the port to which to connect.
        By default, smtplib.SMTP_PORT is used.  If a host is specified the
        connect method is called, and if it returns anything other than a
        success code an SMTPConnectError is raised.  If specified,
        `local_hostname` is used as the FQDN of the local host in the HELO/EHLO
        command.  Otherwise, the local hostname is found using
        socket.getfqdn(). The `source_address` parameter takes a 2-tuple (host,
        port) for the socket to bind to as its source address before
        connecting. If the host is '' and port is 0, the OS default behavior
        will be used.
Initialize a new instance.
Initialize a new instance .
def __init__(self, host='', port=0, local_hostname=None,
                 timeout=socket._GLOBAL_DEFAULT_TIMEOUT,
                 source_address=None):
        """Initialize a new instance.

        If specified, `host` is the name of the remote host to which to
        connect.  If specified, `port` specifies the port to which to connect.
        By default, smtplib.SMTP_PORT is used.  If a host is specified the
        connect method is called, and if it returns anything other than a
        success code an SMTPConnectError is raised.  If specified,
        `local_hostname` is used as the FQDN of the local host in the HELO/EHLO
        command.  Otherwise, the local hostname is found using
        socket.getfqdn(). The `source_address` parameter takes a 2-tuple (host,
        port) for the socket to bind to as its source address before
        connecting. If the host is '' and port is 0, the OS default behavior
        will be used.

        """
        self._host = host
        self.timeout = timeout
        self.esmtp_features = {}
        self.command_encoding = 'ascii'
        self.source_address = source_address
        self._auth_challenge_count = 0

        if host:
            (code, msg) = self.connect(host, port)
            if code != 220:
                self.close()
                raise SMTPConnectError(code, msg)
        if local_hostname is not None:
            self.local_hostname = local_hostname
        else:
            # RFC 2821 says we should use the fqdn in the EHLO/HELO verb, and
            # if that can't be calculated, that we should use a domain literal
            # instead (essentially an encoded IP address like [A.B.C.D]).
            fqdn = socket.getfqdn()
            if '.' in fqdn:
                self.local_hostname = fqdn
            else:
                # We can't find an fqdn hostname, so use a domain literal
                addr = '127.0.0.1'
                try:
                    addr = socket.gethostbyname(socket.gethostname())
                except socket.gaierror:
                    pass
                self.local_hostname = '[%s]' % addr
def __init__ ( self , host = '' , port = 0 , local_hostname = None , timeout = socket . _GLOBAL_DEFAULT_TIMEOUT , source_address = None ) : self . _host = host self . timeout = timeout self . esmtp_features = { } self . command_encoding = 'ascii' self . source_address = source_address self . _auth_challenge_count = 0 if host : ( code , msg ) = self . connect ( host , port ) if code != 220 : self . close ( ) raise SMTPConnectError ( code , msg ) if local_hostname is not None : self . local_hostname = local_hostname else : # RFC 2821 says we should use the fqdn in the EHLO/HELO verb, and # if that can't be calculated, that we should use a domain literal # instead (essentially an encoded IP address like [A.B.C.D]). fqdn = socket . getfqdn ( ) if '.' in fqdn : self . local_hostname = fqdn else : # We can't find an fqdn hostname, so use a domain literal addr = '127.0.0.1' try : addr = socket . gethostbyname ( socket . gethostname ( ) ) except socket . gaierror : pass self . local_hostname = '[%s]' % addr