Registro DMARC
v=spf1 a -all

Registro IPv4
host: projectgutenburg.org
class: IN
ttl: 900
type: A
ip: 199.191.50.73

Servidores DNS Principal (mname) y Secundario (rname)
host: projectgutenburg.org
class: IN
ttl: 300
type: SOA
mname: ns111373.ztomy.com
rname: abuse.confluence-networks.com
serial: 2011062801
refresh: 3600
retry: 900
expire: 604800
minimum-ttl: 86400

Servidor de Correo
host: projectgutenburg.org
class: IN
ttl: 300
type: MX
pri: 300
target: ~

Información TXT
host: projectgutenburg.org
class: IN
ttl: 300
type: TXT
txt: v=spf1 a -all
entries: Array