Registro DMARC
v=spf1 ip4:66.161.21.0/24 ip4:66.161.124.0/24 ip4:66.161.53.0/24 ip4:216.65.219.0/24 ip4:63.251.192.0/24 ip4:74.201.66.0/24 ip4:74.201.67.0/24 ip4:74.201.68.0/24 a mx -all

Registro IPv4
host: zt03.net
class: IN
ttl: 300
type: A
ip: 66.161.21.40

Servidores DNS Principal (mname) y Secundario (rname)
host: zt03.net
class: IN
ttl: 300
type: SOA
mname: infoblox1.bo3.e-dialog.com
rname: root.zt03.net
serial: 2022033107
refresh: 1800
retry: 120
expire: 1209600
minimum-ttl: 900

Servidor de Correo
host: zt03.net
class: IN
ttl: 300
type: MX
pri: 30
target: mx3.zt03.net

Servidor de Correo
host: zt03.net
class: IN
ttl: 300
type: MX
pri: 10
target: mx1.zt03.net

Información TXT
host: zt03.net
class: IN
ttl: 300
type: TXT
txt: v=spf1 include:irv-spf.zt04.net include:dls-spf.zt04.net include:els-spf.zt04.net include:sec-spf.zt04.net include:xl-spf.zt04.net a mx -all
entries: Array