thanks for the update. especially the spf implementation. but... öhhh, is there somewhere any documentation on how to activate and configure this? it would be great to have some sort of step by step howto manual. sa-docs on apache.org are not specific or clear enough.
The SPF plugin is activated by default, there is nothing you can configure other than the scores. You find the scores in the file 50_scores.cf, in the sa\ruleset subdirectory of your installation, but I would advise against modifying them.