Servidores DNS Principal (mname) y Secundario (rname)
host: sigop.net
class: IN
ttl: 3600
type: SOA
mname: ns1.stackdns.com
rname: hostmaster.stackdns.com
serial: 1750211081
refresh: 1800
retry: 900
expire: 1209600
minimum-ttl: 300

Servidor de Correo
host: sigop.net
class: IN
ttl: 3600
type: MX
pri: 0
target: mx.stackmail.com

Información TXT
host: sigop.net
class: IN
ttl: 3600
type: TXT
txt: v=spf1 include:spf.stackmail.com a mx -all
entries: Array