Install the package on your system:
$ pip install zinnia-spam-checker-mollom
PyMollom will also be installed as a dependency.
Put this setting to enable the spam checker backend:
ZINNIA_SPAM_CHECKER_BACKENDS = ('zinnia_mollom',)
Define these following settings with your credentials:
MOLLOM_PUBLIC_KEYYour Mollom public key
MOLLOM_PRIVATE_KEYYour Mollom private key
Get a free account at http://mollom.com/pricing if you don't already have one.