python send mail

#!/usr/bin/python
# coding=utf-8

import smtplib
from email.mime.text import MIMEText


class Sms(object):
    def __init__(self, mail_host, mail_user, mail_pswd):
        self._mail_host = mail_host
        self._mail_user = mail_user
        self._mail_pswd = mail_pswd
        self._send_address = '%s<%s>' % (self._mail_user, self._mail_user)

    def send(self, mail_address, subject, content):
        target_address = '%s<%s>' % (mail_address, mail_address)

        msg = MIMEText(content)
        msg['Subject'] = subject
        msg['From'] = self._mail_user
        msg['to'] = target_address

        try:
            stp = smtplib.SMTP()
            stp.connect(self._mail_host)
            stp.login(self._mail_user, self._mail_pswd)
            stp.sendmail(self._send_address, target_address, msg.as_string())
            stp.close()
            return True
        except Exception, e:
            print str(e)
            return False

if __name__ == '__main__':
    sms = Sms('smtp.exmail.qq.com', '***@qq.com', '**pswd**')
    r = sms.send('1364546****@139.com', 'klk', 'k')