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: understand-retirement.com
class: IN
ttl: 77188
type: A
ip: 165.160.15.20

Registro IPv4
host: understand-retirement.com
class: IN
ttl: 77188
type: A
ip: 165.160.13.20

Servidores DNS Principal (mname) y Secundario (rname)
host: understand-retirement.com
class: IN
ttl: 77188
type: SOA
mname: dns1.cscdns.net
rname: hostmaster.cscdns.net
serial: 2022011106
refresh: 28800
retry: 7200
expire: 604800
minimum-ttl: 86400

Servidor de Correo
host: understand-retirement.com
class: IN
ttl: 77188
type: MX
pri: 10
target: custmx.cscdns.net