def expn(self, address):
        self.putcmd("expn", quoteaddr(address))
        return self.getreply()

    # some useful methods
SMTP 'expn' command -- expands a mailing list.
dataset/ETHPy150Open deanhiller/databus/webapp/play1.3.x/python/Lib/smtplib.py/SMTP.expn