Registro DMARC
v=DMARC1;p=none;pct=100;rua=mailto:noreply@mail.prep4usmle.com

Registro IPv4
host: prep4usmle.com
class: IN
ttl: 300
type: A
ip: 151.101.1.91

Registro IPv4
host: prep4usmle.com
class: IN
ttl: 300
type: A
ip: 151.101.129.91

Registro IPv4
host: prep4usmle.com
class: IN
ttl: 300
type: A
ip: 151.101.65.91

Registro IPv4
host: prep4usmle.com
class: IN
ttl: 300
type: A
ip: 151.101.193.91

Servidores DNS Principal (mname) y Secundario (rname)
host: prep4usmle.com
class: IN
ttl: 21600
type: SOA
mname: ns-cloud-b1.googledomains.com
rname: cloud-dns-hostmaster.google.com
serial: 7
refresh: 21600
retry: 3600
expire: 259200
minimum-ttl: 300

Servidor de Correo
host: prep4usmle.com
class: IN
ttl: 300
type: MX
pri: 0
target: prep4usmle.com

Información TXT
host: prep4usmle.com
class: IN
ttl: 300
type: TXT
txt: ca3-2d440fee86074bfa860b53403ee89455
entries: Array

Información TXT
host: prep4usmle.com
class: IN
ttl: 300
type: TXT
txt: google-site-verification=nI-z5dbFA9e__Yyc1l9U_-317XdQR4dIrbp3zVldXfg
entries: Array

Información TXT
host: prep4usmle.com
class: IN
ttl: 300
type: TXT
txt: v=spf1 include:_spf.google.com include:sendgrid.net ~all
entries: Array