ru.nl/MX: No response was received from the server over UDP (tried 4 times). See RFC 1035, Sec. 4.2. (192.87.106.101, UDP_-_EDNS0_512_D_KN)
275b1gsz9n.ru.nl/A has errors; select the "Denial of existence" DNSSEC option to see them.
ru.nl/AAAA has errors; select the "Denial of existence" DNSSEC option to see them.
ru.nl/CNAME has errors; select the "Denial of existence" DNSSEC option to see them.
Warnings (4)
ru.nl/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. (131.174.78.16, UDP_-_EDNS0_4096_D_KN)
275b1gsz9n.ru.nl/A has warnings; select the "Denial of existence" DNSSEC option to see them.
ru.nl/AAAA has warnings; select the "Denial of existence" DNSSEC option to see them.
ru.nl/CNAME has warnings; select the "Denial of existence" DNSSEC option to see them.