ip6.arpa/MX has errors; select the "Denial of existence" DNSSEC option to see them.
Warnings (5)
ip6.arpa/SOA: No response was received from the server over UDP (tried 4 times) until the 100 EDNS option was removed. See RFC 6891, Sec. 6.1.2. (2620:37:e000::53, UDP_-_EDNS0_512__O(100)KN)
ip6.arpa/SOA: No response was received from the server over UDP (tried 6 times) until the COOKIE EDNS option was removed (however, this server appeared to respond legitimately to other queries with the COOKIE EDNS option present). See RFC 6891, Sec. 6.1.2. (2620:37:e000::53, UDP_-_EDNS0_4096_D_KN)
ip6.arpa/SOA: No response was received from the server over UDP (tried 8 times) until the 128 EDNS flag was cleared. See RFC 6891, Sec. 6.1.4. (2620:37:e000::53, UDP_-_EDNS0_512_128_KN)
ip6.arpa/TXT has warnings; select the "Denial of existence" DNSSEC option to see them.
ip6.arpa/CNAME has warnings; select the "Denial of existence" DNSSEC option to see them.