> Yup. Part of the motivation for this plugin was to short circuit all the > intermediate plugins and handlers so I can feed the message to sa-learn > and dspam. Until dspam is trained, that's a very important step in > training it. But there's no gain in validating the HELO name, SPF, or > DomainKeys. This plugin and associated changes adds that flexibility while > reducing the code and complexity of the plugins.
It might not be fair to say there's *no* gain. Our HELO validation and SPF plugins (we don't have a DKIM plugin at the moment, for shame) now do their lookups unconditionally and add headers to the message so that our bayes engine can tokenize the headers themselves. Bayes is a little bit of a black box to me, so I can't really quantify just how useful this is, but I'd say it's greater than zero. Dspam even treats headers in a special way to ensure that their usefulness is maximized. -Jared
