升级到3.9.4后，邮件通知时会报错，但是能正常收到邮件，检查设置没有发现问题，有人知道怎么处理吗？
Traceback (most recent call last):
File "D:\veighna_studio\lib\threading.py", line 1016, in _bootstrap_inner
self.run()
File "D:\veighna_studio\lib\threading.py", line 953, in run
self._target(*self._args, **self._kwargs)
File "D:\veighna_studio\lib\site-packages\vnpy\trader\engine.py", line 653, in run
with smtplib.SMTP_SSL(
File "D:\veighna_studio\lib\smtplib.py", line 284, in exit
raise SMTPResponseException(code, message)
smtplib.SMTPResponseException: (-1, b'\x00\x00\x00')

可以参考一下7楼https://www.vnpy.com/forum/topic/33242-yi-zhi-zheng-chang-fa-de-you-jian-tu-ran-bao-cuo?page=1#pid65266