Registro DMARC
v=DMARC1; p=reject; rua=mailto:a@dmarc.facebookmail.com; ruf=mailto:fb-dmarc@datafeeds.phishlabs.com; pct=100

Registro IPv4
host: facebookmail.com
class: IN
ttl: 90
type: A
ip: 157.240.243.14

Servidores DNS Principal (mname) y Secundario (rname)
host: facebookmail.com
class: IN
ttl: 3600
type: SOA
mname: a.ns.facebook.com
rname: dns.facebook.com
serial: 4207849484
refresh: 14400
retry: 1800
expire: 604800
minimum-ttl: 3600

Servidor de Correo
host: facebookmail.com
class: IN
ttl: 90
type: MX
pri: 10
target: smtpin.vvv.facebook.com

Información TXT
host: facebookmail.com
class: IN
ttl: 300
type: TXT
txt: v=spf1 ip4:66.220.144.128/25 ip4:66.220.155.0/24 ip4:66.220.157.0/25 ip4:69.63.178.128/25 ip4:69.63.181.0/24 ip4:69.63.184.0/25 ip4:69.171.232.0/24 ip4:69.171.244.0/23 -all
entries: Array

Información TXT
host: facebookmail.com
class: IN
ttl: 300
type: TXT
txt: google-site-verification=k76l1pDZEIJPFtWuhA4cPgk6LTdZpuBRi5_hAUHcKHE
entries: Array

Información TXT
host: facebookmail.com
class: IN
ttl: 300
type: TXT
txt: google-site-verification=ePQQVIoAQdnnJZX0QAy-128omMo-yKPGK1ZtPunjqP0
entries: Array

Registro IPv6
host: facebookmail.com
class: IN
ttl: 90
type: AAAA
ipv6: 2a03:2880:f078:f:face:b00c::2