Hi all, Has anyone given any thought to special rules or methods designed to catch greymail? That is, mail that perhaps may be opt-in, but abusive, like marketing mailing lists or newsletters?
This might include mail with List-Unsubscribe headers, but that's not necessarily enough to use to block an email. I've written a handful of rules based on Received headers for mail servers like 'businesswatchnetwork.com' or 'list-manage.net' etc, but there's obviously just too many of them and it's time-consuming. Any ideas for improving this process? Any thoughts on how the typical marketing email should be scored with bayes? Perhaps there's a DNSBL or other RBL out there whose purpose is to identify marketing domains? Is anyone interested in sharing resources to start such a thing?
