I'm planning a Mailman server, and looking for a good way to enable list moderators train a spam filter (likely to be either spamassassin or dspam). Has anyone come up with a good way to run training based on list moderator's decisions? Currently I don't have any better strategies than asking list moderators to forward spams one by one to a training address, which seems laborious and most likely to be inconsistently applied.
I am aware of https://bugs.launchpad.net/mailman/+bug/558292 . I'm hoping someone has a better approach.