无法使用Django发送电子邮件

Question

Internal Server Error: /index/
Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/django/core/handlers/base.py", line 126, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/django/core/handlers/base.py", line 124, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/Users/pradeep/Desktop/avinkey-pradeepavula (11)/tecum1/pr1/views.py", line 12, in index
    send_mail('subject', 'message', settings.EMAIL_HOST_USER, ['avulapradeep333@gmail.com'] , fail_silently=False)
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/django/core/mail/__init__.py", line 60, in send_mail
    return mail.send()
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/django/core/mail/message.py", line 291, in send
    return self.get_connection(fail_silently).send_messages([self])
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/django/core/mail/backends/smtp.py", line 103, in send_messages
    new_conn_created = self.open()
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/django/core/mail/backends/smtp.py", line 63, in open
    self.connection = self.connection_class(self.host, self.port, **connection_params)
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/smtplib.py", line 251, in __init__
    (code, msg) = self.connect(host, port)
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/smtplib.py", line 338, in connect
    (code, msg) = self.getreply()
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/smtplib.py", line 394, in getreply
    raise SMTPServerDisconnected("Connection unexpectedly closed")
smtplib.SMTPServerDisconnected: Connection unexpectedly closed

将能够从Django表单发送电子邮件