Let's Debug

Test result for systron.de using dns-01

A test authorization for systron.de to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
DNS problem: SERVFAIL looking up TXT for _acme-challenge.systron.de

Submitted Dec 23 23:58:28 2018. Sat in queue for 3ms. Completed in 10s. Show verbose information.