Registro DMARC
v=DMARC1; p=reject; rua=mailto:xqnmhfy@rua.netcraft.com; ruf=mailto:xqnmhfy@ruf.netcraft.com

Servidores DNS Principal (mname) y Secundario (rname)
host: nix.com
class: IN
ttl: 3600
type: SOA
mname: b1.ns.nix.com
rname: hostmaster.markmonitor.com
serial: 1
refresh: 60
retry: 60
expire: 60
minimum-ttl: 60

Información TXT
host: nix.com
class: IN
ttl: 300
type: TXT
txt: v=spf1 -all
entries: Array