python收发邮件

#coding: utf-8
import smtplib
from email.mime.text import MIMEText
from email.header import Header

sender = '×××@163.com'
receiver = '×××@qq.com'
subject = 'python email test2'
smtpserver = 'smtp.163.com'
username = '×××'
password = '×××' # 授权码，不是密码

msg = MIMEText('你好','text','utf-8')#中文需参数‘utf-8’，单字节字符不需要
msg['Subject'] = Header(subject, 'utf-8')
msg["To"]=receiver
smtp = smtplib.SMTP()
smtp.connect('smtp.163.com')
smtp.login(username, password)
smtp.sendmail(sender, receiver, msg.as_string())
smtp.quit()
------------如果passwd不是授权码的话，报错如下-------------------

jack@jack-desktop:~/work/script/test$ python testemai.py
Traceback (most recent call last):
File "testemai.py", line 19, in <module>
smtp.login(username, password)
File "/home/jack/anaconda/lib/python2.7/smtplib.py", line 622, in login
raise SMTPAuthenticationError(code, resp)
smtplib.SMTPAuthenticationError: (535, 'Error: authentication failed')
jack@jack-desktop:~/work/script/test$ python testemai.py
Traceback (most recent call last):
File "testemai.py", line 19, in <module>
smtp.login(username, password)
File "/home/jack/anaconda/lib/python2.7/smtplib.py", line 622, in login
raise SMTPAuthenticationError(code, resp)
smtplib.SMTPAuthenticationError: (535, 'Error: authentication failed')