=?utf-8?q?=5BPodman=5D?=(Un)subscription is broken

When I subscribed to this list, it took multiple days before I got confirmation. By the moment when I gotten it I no longer needed the mailing list. On top of that, now that I'm trying to unsubscribe, sending a mail to podman-leave(a)lists.podman.io does nothing at all. Over last 3-4 days I send like a dozen of them, it does absolutely nothing.