Registro DMARC
v=DMARC1;p=reject;rua=mailto:dmarc_rua@corp.mail.ru;

Servidores DNS Principal (mname) y Secundario (rname)
host: ivanov4.ru
class: IN
ttl: 14264
type: SOA
mname: ns1.reg.ru
rname: hostmaster.ns1.reg.ru
serial: 1776407734
refresh: 14400
retry: 3600
expire: 604800
minimum-ttl: 10800

Servidor de Correo
host: ivanov4.ru
class: IN
ttl: 14264
type: MX
pri: 0
target: emx.mail.ru

Información TXT
host: ivanov4.ru
class: IN
ttl: 14264
type: TXT
txt: v=spf1 redirect=_spf.mail.ru
entries: Array