Hey folks! Over Christmas break I received an email for Diane. I'm not Diane. It was a transactional email so didn't have subscribe and there was no standard way to inform the commercial sender they had the wrong person. With postal mail you just write "No Such Recipient, Return To Sender" but there's no direct equivalent for email! But there could be. So I mirrored a proposed standard to solve for this after RFC 8058 (One Click Unsubscribe). It has had some good discussion on the IETF ART list and I'm looking forward to presenting at IETF 119 but would love the HN community's thoughts about solving for this!