Registro DMARC
v=DMARC1; p=none; fo=1; rua=mailto:dmarc_rua@emaildefense.proofpoint.com; ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com

Registro IPv4
host: howtotrainyourdragon.nl
class: IN
ttl: 604800
type: A
ip: 54.71.113.214

Servidores DNS Principal (mname) y Secundario (rname)
host: howtotrainyourdragon.nl
class: IN
ttl: 604800
type: SOA
mname: ns1.nbcuni.com
rname: domain\.admin.nbcuni.com
serial: 2018052010
refresh: 86400
retry: 86400
expire: 86400
minimum-ttl: 86400