More than 90 days have passed since we deprecated the ACMEv1 API and started returning an error message for subscribers to update their clients. Now, all certificates that were previously issued by that endpoint have expired. In continuation with the deprecation plans, we have removed the DNS records for acme-v01.api.letsencrypt.org and are no longer returning an error message. Users will now see general connection errors if they attempt to use the ACMEv1 endpoint.