@david @meow @nyanide @mint @prettygood No they don't. In fact that's the reason why Misskey admins complain about some big instance going down and bloating their work queue with jobs that will never complete. For Misskey to register that instance as offline "forever", you are supposed to return HTTP 410 Gone to all requests. Otherwise it will keep trying to send stuff there unless you manually suspend that offline instance and clean the work queue.