Registro DMARC
v=DMARC1; p=reject; sp=none

Servidores DNS Principal (mname) y Secundario (rname)
host: pc-city.org
class: IN
ttl: 15002
type: SOA
mname: dns1.zaccodigitaltrustlabs.com
rname: dns.digicertdns.com
serial: 2026010103
refresh: 43200
retry: 3600
expire: 1209600
minimum-ttl: 180

Servidor de Correo
host: pc-city.org
class: IN
ttl: 300
type: MX
pri: 0
target: 

Información TXT
host: pc-city.org
class: IN
ttl: 300
type: TXT
txt: v=spf1 -all
entries: Array