It would be really great if the Mailhosts feature could be abused to prevent reporting mailing list hosts as spam sources. Alternatively, the addition of a MailingLists feature, that simply devnulled reported items that arrived via a configured mailing list, would be mosts welcome. Inspecting the headers of every spam item I receive, just to make sure it didn't come in via a mailing list, is onerous. I've just run into this problem with the Debian package tracking system, and since I can't risk being unsubscribed from certain package notifications, I either need to review the headers of every message prior to submission, or I need to stop reporting. Maybe there's another approach that works well for others, that simply hasn't occurred to me?