&gt; It has a bug though, every time you start the server it requests a new certificate, so after a few restarts you will get your domain temporarily banned from let&#x27;s encrypt.<p>There is a bug in the case of a failure in which it doesn&#x27;t write the successfully-obtained certs to disk, but that will be fixed in the next patch release. Caddy <i>does</i> reuse certificates if it already obtained them before; it persists them to the disk for next time.