[Answered ]-Debugging django on nginx Server Error (500)

Django sends an E-Mail to all ADMINS, when DEBUG is False and some EMAIL_* settings are properly set.

See:

https://docs.djangoproject.com/en/1.10/howto/error-reporting/

You can also setup an appropriate logging to do that:

https://docs.djangoproject.com/en/1.10/topics/logging/

for more information.