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

Registro IPv4
host: astra.dev
class: IN
ttl: 1800
type: A
ip: 67.199.248.12

Servidores DNS Principal (mname) y Secundario (rname)
host: astra.dev
class: IN
ttl: 86400
type: SOA
mname: dns1.p05.nsone.net
rname: hostmaster.nsone.net
serial: 1774031427
refresh: 43200
retry: 3600
expire: 1209600
minimum-ttl: 180

Servidor de Correo
host: astra.dev
class: IN
ttl: 1800
type: MX
pri: 0
target: 

Información TXT
host: astra.dev
class: IN
ttl: 1800
type: TXT
txt: v=spf1 -all
entries: Array