Servidores DNS Principal (mname) y Secundario (rname)
host: a51.org
class: IN
ttl: 1800
type: SOA
mname: ns1.gandi.net
rname: hostmaster.gandi.net
serial: 1727308800
refresh: 10800
retry: 3600
expire: 604800
minimum-ttl: 10800

Servidor de Correo
host: a51.org
class: IN
ttl: 300
type: MX
pri: 10
target: a51-org.mail.protection.outlook.com

Información TXT
host: a51.org
class: IN
ttl: 300
type: TXT
txt: v=spf1 include:spf.protection.outlook.com -all
entries: Array