Registro DMARC
v=DMARC1; p=none;

Registro IPv4
host: therookgroup.com
class: IN
ttl: 10589
type: A
ip: 192.252.154.20

Servidores DNS Principal (mname) y Secundario (rname)
host: therookgroup.com
class: IN
ttl: 2560
type: SOA
mname: ns1.s428.sureserver.com
rname: hostmaster.therookgroup.com
serial: 1792450360
refresh: 16384
retry: 2048
expire: 1048576
minimum-ttl: 2560

Servidor de Correo
host: therookgroup.com
class: IN
ttl: 10564
type: MX
pri: 0
target: mail.therookgroup.com

Información TXT
host: therookgroup.com
class: IN
ttl: 10564
type: TXT
txt: v=spf1 a mx include:s428.smtp-spf.sureserver.com ~all
entries: Array