La traza que aparece es la siguiente (te falta definir el template para el error 500 en Django):
[Mon Jan 28 12:53:10 2013] Traceback (most recent call last):, referer: http://dividel.quijost.com/
[Mon Jan 28 12:53:10 2013] File "/usr/local/lib/python2.7/site-packages/Django-1.4.3-py2.7.egg/django/core/handlers/wsgi.py", line 241, in __call__, referer: http://dividel.quijost.com/
[Mon Jan 28 12:53:10 2013] response = self.get_response(request), referer: http://dividel.quijost.com/
[Mon Jan 28 12:53:10 2013] File "/usr/local/lib/python2.7/site-packages/Django-1.4.3-py2.7.egg/django/core/handlers/base.py", line 153, in get_response, referer: http://dividel.quijost.com/
[Mon Jan 28 12:53:10 2013] response = self.handle_uncaught_exception(request, resolver, sys.exc_info()), referer: http://dividel.quijost.com/
[Mon Jan 28 12:53:10 2013] File "/usr/local/lib/python2.7/site-packages/Django-1.4.3-py2.7.egg/django/core/handlers/base.py", line 228, in handle_uncaught_exception, referer: http://dividel.quijost.com/
[Mon Jan 28 12:53:10 2013] return callback(request, **param_dict), referer: http://dividel.quijost.com/
[Mon Jan 28 12:53:10 2013] File "/usr/local/lib/python2.7/site-packages/Django-1.4.3-py2.7.egg/django/utils/decorators.py", line 91, in _wrapped_view, referer: http://dividel.quijost.com/
[Mon Jan 28 12:53:10 2013] response = view_func(request, *args, **kwargs), referer: http://dividel.quijost.com/
[Mon Jan 28 12:53:10 2013] File "/usr/local/lib/python2.7/site-packages/Django-1.4.3-py2.7.egg/django/views/defaults.py", line 32, in server_error, referer: http://dividel.quijost.com/
[Mon Jan 28 12:53:10 2013] t = loader.get_template(template_name) # You need to create a 500.html template., referer: http://dividel.quijost.com/
[Mon Jan 28 12:53:10 2013] File "/usr/local/lib/python2.7/site-packages/Django-1.4.3-py2.7.egg/django/template/loader.py", line 145, in get_template, referer: http://dividel.quijost.com/
[Mon Jan 28 12:53:10 2013] template, origin = find_template(template_name), referer: http://dividel.quijost.com/
[Mon Jan 28 12:53:10 2013] File "/usr/local/lib/python2.7/site-packages/Django-1.4.3-py2.7.egg/django/template/loader.py", line 138, in find_template, referer: http://dividel.quijost.com/
[Mon Jan 28 12:53:10 2013] raise TemplateDoesNotExist(name), referer: http://dividel.quijost.com/
[Mon Jan 28 12:53:10 2013] TemplateDoesNotExist: 500.html, referer: http://dividel.quijost.com/
Lo que me parece extraño es lo que comentas de distribute, no se que tiene que ver ya que no tendrías permisos root para instalaciones de paquetes (a menos que uses virtualenv).
Sobre que no te lleguen el envio de correos, puede ser porque cPanel tiene impuesto un límite de 150 email por usuario a la hora, si lo has sobrepasado en una hora podrás enviar de nuevo.