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

问题遇到的现象和发生背景

[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

问题相关代码，请勿粘贴截图

运行结果及报错内容

Traceback (most recent call last):
  File "F:/PycharmProjects/FirstPythonProject/jyb_biaodan/runtest.py", line 111, in <module>
    yag.send('799196076@qq.com', u'自动化测试报告', content)
  File "E:\Python38\lib\site-packages\yagmail\sender.py", line 156, in send
    self.login()
  File "E:\Python38\lib\site-packages\yagmail\sender.py", line 210, in login
    self._login(self.credentials)
  File "E:\Python38\lib\site-packages\yagmail\sender.py", line 217, in _login
    self.smtp = self.connection(self.host, self.port, **self.kwargs)
  File "E:\Python38\lib\smtplib.py", line 1034, in __init__
    SMTP.__init__(self, host, port, local_hostname, timeout,
  File "E:\Python38\lib\smtplib.py", line 253, in __init__
    (code, msg) = self.connect(host, port)
  File "E:\Python38\lib\smtplib.py", line 339, in connect
    self.sock = self._get_socket(host, port, self.timeout)
  File "E:\Python38\lib\smtplib.py", line 1040, in _get_socket
    new_socket = socket.create_connection((host, port), timeout,
  File "E:\Python38\lib\socket.py", line 808, in create_connection
    raise err
  File "E:\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。

我的解答思路和尝试过的方法

我想要达到的结果

大lao好，这个尝试失败是为啥，应该怎么解决