Registro DMARC
v=spf1 mx a include:mail2.small.pl -all

Registro IPv4
host: sasoftwaredevelopment.com
class: IN
ttl: 1398
type: A
ip: 128.204.223.15

Servidores DNS Principal (mname) y Secundario (rname)
host: sasoftwaredevelopment.com
class: IN
ttl: 1200
type: SOA
mname: dns1.small.pl
rname: admin.admin.net.pl
serial: 2025130002
refresh: 10800
retry: 3600
expire: 604800
minimum-ttl: 10800

Servidor de Correo
host: sasoftwaredevelopment.com
class: IN
ttl: 1399
type: MX
pri: 10
target: mail2.small.pl

Información TXT
host: sasoftwaredevelopment.com
class: IN
ttl: 1399
type: TXT
txt: v=spf1 mx a include:mail2.small.pl -all
entries: Array