Registro DMARC
v=spf1 a mx -all

Registro IPv4
host: specification.biz
class: IN
ttl: 3600
type: A
ip: 185.170.106.33

Servidores DNS Principal (mname) y Secundario (rname)
host: specification.biz
class: IN
ttl: 604800
type: SOA
mname: ns1.dinfo.com.pl
rname: admin.dinfo.com.pl
serial: 1761987120
refresh: 10800
retry: 900
expire: 1209600
minimum-ttl: 86400

Servidor de Correo
host: specification.biz
class: IN
ttl: 3600
type: MX
pri: 10
target: mail.specification.biz

Información TXT
host: specification.biz
class: IN
ttl: 3600
type: TXT
txt: v=spf1 a mx -all
entries: Array