Registro DMARC
v=DMARC1; p=reject; rua=mailto:dmarc_agg@dmarc.everest.email; ruf=mailto:dmarc_fr@dmarc.everest.email; fo=1; pct=100; rf=afrf

Registro IPv4
host: citymail.org
class: IN
ttl: 90
type: A
ip: 52.208.23.237

Registro IPv4
host: citymail.org
class: IN
ttl: 90
type: A
ip: 54.217.0.99

Servidores DNS Principal (mname) y Secundario (rname)
host: citymail.org
class: IN
ttl: 900
type: SOA
mname: ns-816.awsdns-38.net
rname: awsdns-hostmaster.amazon.com
serial: 1
refresh: 7200
retry: 900
expire: 1209600
minimum-ttl: 86400

Servidor de Correo
host: citymail.org
class: IN
ttl: 3600
type: MX
pri: 10
target: inbound-smtp.eu-west-1.amazonaws.com

Información TXT
host: citymail.org
class: IN
ttl: 3600
type: TXT
txt: v=spf1 include:_spf.smtp.com include:amazonses.com include:mailgun.org -all
entries: Array