Registro DMARC
v=DMARC1;p=reject

Servidores DNS Principal (mname) y Secundario (rname)
host: astralnalog.ru
class: IN
ttl: 12555
type: SOA
mname: ns1.reg.ru
rname: hostmaster.ns1.reg.ru
serial: 1785147978
refresh: 14400
retry: 3600
expire: 604800
minimum-ttl: 10800

Servidor de Correo
host: astralnalog.ru
class: IN
ttl: 12555
type: MX
pri: 10
target: mx.yandex.net

Información TXT
host: astralnalog.ru
class: IN
ttl: 12555
type: TXT
txt: v=spf1 redirect=_spf.yandex.net
entries: Array