> Our (commercial) software has a similar feature, not quite as fancy as > amavisd's, but still pretty useful.
Many things become clear to me now ! Are you an antispam vendor? No offence but ...now I understand why a "simple" solution makes no sense to you ! You need a big thing wich wastes a lot of resources in order to get people pay for that (commercial) package ! You can not also tell people who pay you that has to mark or reply emails a few days in order to train the whitelist.
