Registro DMARC
v=DMARC1;p=none;

Registro IPv4
host: pressbooks.com
class: IN
ttl: 90
type: A
ip: 18.172.213.127

Registro IPv4
host: pressbooks.com
class: IN
ttl: 90
type: A
ip: 18.172.213.81

Registro IPv4
host: pressbooks.com
class: IN
ttl: 90
type: A
ip: 18.172.213.101

Registro IPv4
host: pressbooks.com
class: IN
ttl: 90
type: A
ip: 18.172.213.40

Servidores DNS Principal (mname) y Secundario (rname)
host: pressbooks.com
class: IN
ttl: 900
type: SOA
mname: ns-877.awsdns-45.net
rname: awsdns-hostmaster.amazon.com
serial: 1
refresh: 7200
retry: 900
expire: 1209600
minimum-ttl: 86400

Servidor de Correo
host: pressbooks.com
class: IN
ttl: 90
type: MX
pri: 30
target: alt2.aspmx.l.google.com

Servidor de Correo
host: pressbooks.com
class: IN
ttl: 90
type: MX
pri: 40
target: aspmx2.googlemail.com

Servidor de Correo
host: pressbooks.com
class: IN
ttl: 90
type: MX
pri: 20
target: alt1.aspmx.l.google.com

Servidor de Correo
host: pressbooks.com
class: IN
ttl: 90
type: MX
pri: 10
target: aspmx.l.google.com

Servidor de Correo
host: pressbooks.com
class: IN
ttl: 90
type: MX
pri: 50
target: aspmx3.googlemail.com

Información TXT
host: pressbooks.com
class: IN
ttl: 90
type: TXT
txt: v=spf1 a include:_spf.google.com include:spf.mtasv.net include:mail.zendesk.com include:40117020.spf02.hubspotemail.net ~all
entries: Array

Información TXT
host: pressbooks.com
class: IN
ttl: 90
type: TXT
txt: google-site-verification=Ej_ZwcK9oJJFOR2yEnWDKTXAmg0_AOUWF-AvUMwzCrM
entries: Array