SMTPAuthenticationError 535 Error（关键词：flask/bug）

报错信息简略版：

SMTPAuthenticationError: (535, 'Error: \xc7\xeb\xca\xb9\xd3\xc3\xca\xda\xc8\xa8\xc2\xeb\xb5\xc7\xc2\xbc\xa1\xa3\xcf\xea\xc7\xe9\xc7\xeb\xbf\xb4: http://service.mail.qq.com/cgi-bin/help?subtype=1&&id=28&&no=1001256')

报错信息完整版：

(venv_flask_henry) henry@henry-virtual-machine:~/dev/flask_henry$ python hello.py shell

>>> from flask_mail import Message
>>> from hello import mail
>>> msg = Message('test subject', sender='[email protected]', recipients=['[email protected]'])
>>> msg.body = 'text body'
>>> msg.html = 'HTML body'
>>> with app.app_context():
...     mail.send(msg)
... 
Traceback (most recent call last):
  File "", line 2, in 
  File "/home/henry/dev/flask_henry/venv_flask_henry/local/lib/python2.7/site-packages/flask_mail.py", line 491, in send
    with self.connect() as connection:
  File "/home/henry/dev/flask_henry/venv_flask_henry/local/lib/python2.7/site-packages/flask_mail.py", line 144, in __enter__
    self.host = self.configure_host()
  File "/home/henry/dev/flask_henry/venv_flask_henry/local/lib/python2.7/site-packages/flask_mail.py", line 165, in configure_host
    host.login(self.mail.username, self.mail.password)
  File "/usr/lib/python2.7/smtplib.py", line 622, in login
    raise SMTPAuthenticationError(code, resp)
SMTPAuthenticationError: (535, 'Error: \xc7\xeb\xca\xb9\xd3\xc3\xca\xda\xc8\xa8\xc2\xeb\xb5\xc7\xc2\xbc\xa1\xa3\xcf\xea\xc7\xe9\xc7\xeb\xbf\xb4: http://service.mail.qq.com/cgi-bin/help?subtype=1&&id=28&&no=1001256')

根据互联网上搜到的：
Flask发送邮件
和报错信息中给的链接:
http://service.mail.qq.com/cgi-bin/help?subtype=1&&id=28&&no=1001256’

原因就是，应该是授权码，而不是普通的邮箱密码。

参考文献：
1.Flask发送邮件
2.什么是授权码，它又是如何设置？