A test authorization for syslog.digitalisland.co.nz to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
Fetching http://syslog.digitalisland.co.nz/.well-known/acme-challenge/ktpO0A9KjOyapWVvSgKScPIWDVmrfhnx5PHA-N4dPxY: Timeout during connect (likely firewall problem)