SMTPServerDisconnected: Connection unexpectedly closed  File "django/core/handlers/base.py", line 111, in get_response    response = wrapped_callback(request, *callback_args, **callback_kwargs)  File "django/views/generic/base.py", line 69, in view    return self.dispatch(request, *args, **kwargs)  File "django/utils/decorators.py", line 29, in _wrapper    return bound_func(*args, **kwargs)  File "django/views/decorators/debug.py", line 76, in sensitive_post_parameters_wrapper    return view(request, *args, **kwargs)  File "django/utils/decorators.py", line 25, in bound_func    return func.__get__(self, type(self))(*args2, **kwargs2)  File "allauth/account/views.py", line 173, in dispatch    return super(SignupView, self).dispatch(request, *args, **kwargs)  File "allauth/account/views.py", line 68, in dispatch    **kwargs)  File "allauth/account/views.py", line 151, in dispatch    **kwargs)  File "django/views/generic/base.py", line 87, in dispatch    return handler(request, *args, **kwargs)  File "allauth/account/views.py", line 84, in post    response = self.form_valid(form)  File "allauth/account/views.py", line 189, in form_valid    self.get_success_url())  File "allauth/account/utils.py", line 167, in complete_signup    signal_kwargs=signal_kwargs)  File "allauth/account/utils.py", line 131, in perform_login    send_email_confirmation(request, user, signup=signup)  File "allauth/account/utils.py", line 296, in send_email_confirmation    signup=signup)  File "allauth/account/models.py", line 58, in send_confirmation    confirmation.send(request, signup=signup)  File "allauth/account/models.py", line 122, in send    get_adapter().send_confirmation_mail(request, self, signup)  File "allauth/account/adapter.py", line 355, in send_confirmation_mail    ctx)  File "allauth/account/adapter.py", line 102, in send_mail    msg.send()  File "django/core/mail/message.py", line 286, in send    return self.get_connection(fail_silently).send_messages([self])  File "django/core/mail/backends/smtp.py", line 92, in send_messages    new_conn_created = self.open()  File "django/core/mail/backends/smtp.py", line 59, in open    self.connection.login(self.username, self.password)  File "python3.4/smtplib.py", line 642, in login    "%s %s" % (AUTH_LOGIN, encode_base64(user.encode('ascii'), eol='')))  File "python3.4/smtplib.py", line 404, in docmd    return self.getreply()  File "python3.4/smtplib.py", line 376, in getreply    raise SMTPServerDisconnected("Connection unexpectedly closed")