As I said from the beginning:
Server with IPv6 AAAA record only
So I have no A record.
I got the following output in addition to the logfile:
IMPORTANT NOTES:
-
The following errors were reported by the server:
Domain: s20.bistruphave.dk
Type: dns
Detail: During secondary validation: DNS problem: NXDOMAIN looking
up A for s20.bistruphave.dk - check that a DNS record exists for
this domain