Registro DMARC
v=spf1 include:_spf.daum.net ~all

Registro IPv4
host: st-research.co.kr
class: IN
ttl: 1800
type: A
ip: 112.175.247.162

Servidores DNS Principal (mname) y Secundario (rname)
host: st-research.co.kr
class: IN
ttl: 1800
type: SOA
mname: st-research.co.kr
rname: postmaster.st-research.co.kr
serial: 20180809
refresh: 10800
retry: 3600
expire: 3600000
minimum-ttl: 43200

Servidor de Correo
host: st-research.co.kr
class: IN
ttl: 1800
type: MX
pri: 20
target: ALT.ASPMX.daum.net

Servidor de Correo
host: st-research.co.kr
class: IN
ttl: 1800
type: MX
pri: 10
target: ASPMX.daum.net

Información TXT
host: st-research.co.kr
class: IN
ttl: 1800
type: TXT
txt: v=spf1 include:_spf.daum.net ~all
entries: Array