he.net/A: The UDP connection was refused (ECONNREFUSED). See RFC 1035, Sec. 4.2. (216.66.80.18, UDP_-_EDNS0_4096_D_KN)
he.net/MX: No response was received from the server over UDP (tried 4 times). See RFC 1035, Sec. 4.2. (216.66.80.18, UDP_-_EDNS0_512_D_KN)
he.net/NSEC3PARAM has errors; select the "Denial of existence" DNSSEC option to see them.
6k28j5wgx3.he.net/A has errors; select the "Denial of existence" DNSSEC option to see them.
Warnings (2)
he.net/SOA: No response was received until the UDP payload size was decreased, indicating that the server might be attempting to send a payload that exceeds the path maximum transmission unit (PMTU) size. See RFC 6891, Sec. 6.2.6. (216.66.80.18, UDP_-_EDNS0_4096_D_KN_0x20)
he.net/DNSKEY has warnings; select the "Denial of existence" DNSSEC option to see them.