Registro DMARC
v=DMARC1;p=none

Servidores DNS Principal (mname) y Secundario (rname)
host: ultra-seminar.org
class: IN
ttl: 900
type: SOA
mname: ns-179.awsdns-22.com
rname: awsdns-hostmaster.amazon.com
serial: 1
refresh: 7200
retry: 900
expire: 1209600
minimum-ttl: 86400

Servidor de Correo
host: ultra-seminar.org
class: IN
ttl: 300
type: MX
pri: 10
target: maila.cc.kagoshima-u.ac.jp

Información TXT
host: ultra-seminar.org
class: IN
ttl: 300
type: TXT
txt: v=spf1 +ip4:163.209.0.0/16 ~all
entries: Array