Registro DMARC
v=DMARC1; p=none

Servidores DNS Principal (mname) y Secundario (rname)
host: cdulib.ru
class: IN
ttl: 10117
type: SOA
mname: ns1.reg.ru
rname: hostmaster.ns1.reg.ru
serial: 1788770093
refresh: 14400
retry: 3600
expire: 604800
minimum-ttl: 10800

Servidor de Correo
host: cdulib.ru
class: IN
ttl: 10117
type: MX
pri: 50
target: m4.cdulib.ru

Información TXT
host: cdulib.ru
class: IN
ttl: 10117
type: TXT
txt: v=spf1 +ip4:138.124.15.15 include:spf.mindbox.ru +mx -all
entries: Array

Información TXT
host: cdulib.ru
class: IN
ttl: 10117
type: TXT
txt: mailru-verification: f0babbe4cb3b3394
entries: Array