python-简单的邮件发送

# _*_ coding: utf-8 _*_

import smtplib
from email.mime.text import MIMEText

mailto_list = ["email@host"]
mail_host = "smtp.163.com"   # 这里以163为例
mail_user = "emailname"  # 只要name就好，不需要host
mail_pass = "password"  # 这里不是登陆密码而是授权码 在“设置”--“客户端授权码”中可设置
mail_postfix = "163.com"  # host

def send_mail(to_list, sub, content):
me = "哈利骑着扫帚通知你" + "<" + mail_user + "@" + mail_postfix + ">"  # 这里设置的是收件人收到邮件里面的发件人名称和地址
msg = MIMEText(content, _subtype="plain", _charset="utf-8")  # 这里设置邮件内容（不含附件）
msg["Subject"] = sub  # 这里是邮件主题
msg["From"] = me
msg["To"] = ";".join(mailto_list)  # 可以批量发邮件

try:
server = smtplib.SMTP()
server.connect(mail_host)
server.login(mail_user, mail_pass)
server.sendmail(me, to_list, msg.as_string())
server.close()
return True
except Exception as exce:
print("111", exce)
return False

if __name__ == '__main__':
if send_mail(mailto_list, "邮件主题", "邮件内容"):
print("yes")
else:
print("no")

535,  Error: authentication failed