Registro DMARC
v=DMARC1; p=quarantine; rua=mailto:security_email@b2bsvcs.com

Servidores DNS Principal (mname) y Secundario (rname)
host: b2bsvcs.com
class: IN
ttl: 21600
type: SOA
mname: ns-cloud-d1.googledomains.com
rname: cloud-dns-hostmaster.google.com
serial: 13
refresh: 21600
retry: 3600
expire: 259200
minimum-ttl: 300

Servidor de Correo
host: b2bsvcs.com
class: IN
ttl: 3600
type: MX
pri: 5
target: alt1.aspmx.l.google.com

Servidor de Correo
host: b2bsvcs.com
class: IN
ttl: 3600
type: MX
pri: 5
target: alt2.aspmx.l.google.com

Servidor de Correo
host: b2bsvcs.com
class: IN
ttl: 3600
type: MX
pri: 10
target: aspmx3.googlemail.com

Servidor de Correo
host: b2bsvcs.com
class: IN
ttl: 3600
type: MX
pri: 1
target: aspmx.l.google.com

Servidor de Correo
host: b2bsvcs.com
class: IN
ttl: 3600
type: MX
pri: 10
target: aspmx2.googlemail.com

Información TXT
host: b2bsvcs.com
class: IN
ttl: 600
type: TXT
txt: google-site-verification=5uVhdkAUlXDE12q1J0Kv5Ha0SZCgOGzDpYWWTkKUEnM
entries: Array

Información TXT
host: b2bsvcs.com
class: IN
ttl: 600
type: TXT
txt: v=spf1 include:_spf.google.com ~all
entries: Array