Add tests for sending messages to emails without account.
Add tests for sending messages to emails without account.

sonofatailor/django-oscar,django-oscar/django-oscar,sasha0/django-oscar,solarissmoke/django-oscar,okfish/django-oscar,okfish/django-oscar,django-oscar/django-oscar,solarissmoke/django-oscar,solarissmoke/django-oscar,sonofatailor/django-oscar,solarissmoke/django-oscar,django-oscar/django-oscar,sasha0/django-oscar,django-oscar/django-oscar,sasha0/django-oscar,okfish/django-oscar,okfish/django-oscar,sasha0/django-oscar,sonofatailor/django-oscar,sonofatailor/django-oscar