mx.serviciodecorreo.es has no NS records.
NS records for this zone are defined at serviciodecorreo.es.
NS records for this zone are defined at serviciodecorreo.es.
Question and response
Question
dig mx.serviciodecorreo.es. NS
Answer
The response has no answer records.
Authority
serviciodecorreo.es. 600 SOA ns-arsys.ui-dns.es. dnsadmin.ionos.com. 2026011356 14400 3600 605000 600
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0