GIS PY S1E35 python操作电子邮件EMail

总是报错，原以为是自己写的代码问题，后来代码我都是复制粘贴的网站上的，也还是报“TimeoutError: [WinError 10060] 由于连接方在一段时间后没有正确答复或连接的主机没有反应，连接尝试失败。”错误。
Connected to pydev debugger (build 201.6668.115)
Traceback (most recent call last):
File “D:/CODE/Email-python/mian.py”, line 78, in sent
s = smtplib.SMTP_SSL(self._smtp, self._port)
File “C:\Users\Administrator\AppData\Local\Programs\Python\Python38\lib\smtplib.py”, line 1034, in __init__
SMTP.__init__(self, host, port, local_hostname, timeout,
File “C:\Users\Administrator\AppData\Local\Programs\Python\Python38\lib\smtplib.py”, line 253, in __init__
(code, msg) = self.connect(host, port)
File “C:\Users\Administrator\AppData\Local\Programs\Python\Python38\lib\smtplib.py”, line 339, in connect
self.sock = self._get_socket(host, port, self.timeout)
File “C:\Users\Administrator\AppData\Local\Programs\Python\Python38\lib\smtplib.py”, line 1040, in _get_socket
new_socket = socket.create_connection((host, port), timeout,
File “C:\Users\Administrator\AppData\Local\Programs\Python\Python38\lib\socket.py”, line 807, in create_connection
raise err
File “C:\Users\Administrator\AppData\Local\Programs\Python\Python38\lib\socket.py”, line 796, in create_connection
sock.connect(sa)
TimeoutError: [WinError 10060] 由于连接方在一段时间后没有正确答复或连接的主机没有反应，连接尝试失败。

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File “C:\Program Files\JetBrains\PyCharm Community Edition 2020.1\plugins\python-ce\helpers\pydev\pydevd.py”, line 1438, in _exec
pydev_imports.execfile(file, globals, locals) # execute the script
File “C:\Program Files\JetBrains\PyCharm Community Edition 2020.1\plugins\python-ce\helpers\pydev\_pydev_imps\_pydev_execfile.py”, line 18, in execfile
exec(compile(contents+”\n”, file, ‘exec’), glob, loc)
File “D:/CODE/Email-python/mian.py”, line 93, in
email.sent(msg)
File “D:/CODE/Email-python/mian.py”, line 84, in sent
s.quit()
UnboundLocalError: local variable ‘s’ referenced before assignment

Process finished with exit code 1