'Fail because authentication is required, but the server does not support
ESMTP, which is required for authentication.
@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 esmtpEHLORequired(self, code=(-1), resp=None):

    self.sendError(EHLORequiredError(502, 'Server    does    not    support    ESMTP    Authentication', self.log.str()))
