Actually, Gmail does something close to that. When you click "Report as spam", if it detects it's a mailing list, it offers to (try to) unsubscribe properly:

Actually, Gmail does something close to that. When you click "Report as spam", if it detects it's a mailing list, it offers to (try to) unsubscribe properly: http://gmailblog.blogspot.com/2009/07/unsubscribing-made-easy.html http://gmailblog.blogspot.com/2009/07/unsubscribing-made-eas... It's a bit strange that they don't give you the option then to unsubscribe without marking as spam (you can do it but with more clicks), but I would think that if you unsubscribe and mark as spam the overall system doesn't take the spam factor at all or as much. In that case, it's probably limited to your own account.