Registro DMARC
v=DMARC1; p=reject; fo=1; rua=mailto:dmarc_rua@emaildefense.proofpoint.com; ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com

Registro IPv4
host: marathon.com
class: IN
ttl: 3600
type: A
ip: 104.198.14.52

Servidores DNS Principal (mname) y Secundario (rname)
host: marathon.com
class: IN
ttl: 3600
type: SOA
mname: pdns107.ultradns.com
rname: hostmaster.marathonoil.com
serial: 48
refresh: 3600
retry: 600
expire: 604800
minimum-ttl: 1800