de to madavi.de: No valid RRSIGs made by a key corresponding to a DS RR were found covering the DNSKEY RRset, resulting in no secure entry point (SEP) into the zone. See RFC 4035, Sec. 2.2, RFC 6840, Sec. 5.11.
madavi.de zone: The server(s) were not responsive to queries over UDP. See RFC 1035, Sec. 4.2. (81.169.169.173, 85.214.57.119, 85.214.67.97, 85.214.215.172, 2a01:238:4202:e00:342a:970a:ad33:75fd, 2a01:238:4244:bd00:54b7:3b77:e3ee:4e7c, 2a01:238:4259:b400:1e5d:9714:fa8b:6155, 2a01:238:4320:ac00:d032:15f8:7ec3:e2f6)
madavi.de zone: There was an error resolving the following NS name(s) to address(es): ns1.madavi.de, ns2.madavi.de, ns3.madavi.de, ns4.madavi.de
madavi.de/A: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (81.169.169.173, 85.214.57.119, 85.214.67.97, 85.214.215.172, 2a01:238:4202:e00:342a:970a:ad33:75fd, 2a01:238:4244:bd00:54b7:3b77:e3ee:4e7c, 2a01:238:4259:b400:1e5d:9714:fa8b:6155, 2a01:238:4320:ac00:d032:15f8:7ec3:e2f6, UDP_-_NOEDNS_)
madavi.de/NS: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (81.169.169.173, 85.214.57.119, 85.214.67.97, 85.214.215.172, 2a01:238:4202:e00:342a:970a:ad33:75fd, 2a01:238:4244:bd00:54b7:3b77:e3ee:4e7c, 2a01:238:4259:b400:1e5d:9714:fa8b:6155, 2a01:238:4320:ac00:d032:15f8:7ec3:e2f6, UDP_-_NOEDNS_)