'Fail because TLS is required and the server does not support it.
@param code: The server status code from the most recently received
server message.
@type code: L{int}
@param resp: The server status response from the most recently received
server message.
@type resp: L{bytes}'

def esmtpTLSRequired(self, code=(-1), resp=None):

    self.sendError(TLSRequiredError(502, 'Server    does    not    support    secure    communication    via    TLS    /    SSL', self.log.str()))
