Adds an SPF authorization extension to python-slimta. This enables MTAs built on python-slimta to apply policies to incoming mail based on the result of an SPF lookup check.

If you haven't yet installed python-slimta, refer to the "Getting Started" section. Once inside your virtualenv:

(.venv)$ python setup.py develop

To run the suite of included unit tests:

(.venv)$ nosetests

Refer to the API Documentation and Manual for more information on using this extension.