我试着为django应用设置电子邮件确认，在几个失败的步骤之后，我尝试了简单的python模块使用smtplib (通过科里的 tutorial )，但在教程的第一部分，当他收到电子邮件后，我在大约30秒的等待后得到了这个错误：

Traceback (most recent call last):
  File "main.py", line 10, in <module>
    with smtplib.SMTP('smtp.gmail.com', port) as smtp:
  File "/usr/lib/python3.8/smtplib.py", line 253, in __init__
    (code, msg) = self.connect(host, port)
  File "/usr/lib/python3.8/smtplib.py", line 339, in connect
    self.sock = self._get_socket(host, port, self.timeout)
  File "/usr/lib/python3.8/smtplib.py", line 308, in _get_socket
    return socket.create_connection((host, port), timeout,
  File "/usr/lib/python3.8/socket.py", line 808, in create_connection
    raise err
  File "/usr/lib/python3.8/socket.py", line 796, in create_connection
    sock.connect(sa)
OSError: [Errno 101] Network is unreachable

这是代码

with smtplib.SMTP('smtp.gmail.com', 587) as smtp:
        smtp.ehlo()
        smtp.starttls()
        smtp.ehlo()
        smtp.login(username, password)
        subject = 'Test'
        body = 'Testing smtp library'
        msg = f'Subject: {subject}\n\n{body}'
        smtp.sendmail(username, username, msg)

我正在使用双因素身份验证和应用程序密码，我已经检查了16位密码，但是我不知道是否可以使用这些凭据登录。