Django ERROR

Environment:


Request Method: POST
Request URL: http://127.0.0.1:8000/user-data-change-proc

Django Version: 1.10.1
Python Version: 3.5.2
Installed Applications:
['django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'eblagajna']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware']



Traceback:

File "D:\Python35\lib\site-packages\django\core\handlers\exception.py" in inner
  39.             response = get_response(request)

File "D:\Python35\lib\site-packages\django\core\handlers\base.py" in _legacy_get_response
  249.             response = self._get_response(request)

File "D:\Python35\lib\site-packages\django\core\handlers\base.py" in _get_response
  187.                 response = self.process_exception_by_middleware(e, request)

File "D:\Python35\lib\site-packages\django\core\handlers\base.py" in _get_response
  185.                 response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "D:\Python35\lib\site-packages\django\contrib\auth\decorators.py" in _wrapped_view
  23.                 return view_func(request, *args, **kwargs)

File "C:\Projects\BLAGAJNA_PY\eblagajna\views.py" in spremembapodatkovproc
  197.         msg.send()

File "D:\Python35\lib\site-packages\django\core\mail\message.py" in send
  342.         return self.get_connection(fail_silently).send_messages([self])

File "D:\Python35\lib\site-packages\django\core\mail\backends\smtp.py" in send_messages
  107.                 sent = self._send(message)

File "D:\Python35\lib\site-packages\django\core\mail\backends\smtp.py" in _send
  120.         recipients = [sanitize_address(addr, encoding) for addr in email_message.recipients()]

File "D:\Python35\lib\site-packages\django\core\mail\backends\smtp.py" in <listcomp>
  120.         recipients = [sanitize_address(addr, encoding) for addr in email_message.recipients()]

File "D:\Python35\lib\site-packages\django\core\mail\message.py" in sanitize_address
  161.         address = Address(nm, addr_spec=addr)

File "D:\Python35\lib\email\headerregistry.py" in __init__
  42.             a_s, rest = parser.get_addr_spec(addr_spec)

File "D:\Python35\lib\email\_header_value_parser.py" in get_addr_spec
  1988.     token, value = get_local_part(value)

File "D:\Python35\lib\email\_header_value_parser.py" in get_local_part
  1800.     if value[0] in CFWS_LEADER:

Exception Type: IndexError at /user-data-change-proc
Exception Value: string index out of range