Registro DMARC
v=spf1 -all

Registro IPv4
host: nationalyellowbook.com
class: IN
ttl: 9550
type: A
ip: 172.233.219.49

Servidores DNS Principal (mname) y Secundario (rname)
host: nationalyellowbook.com
class: IN
ttl: 16750
type: SOA
mname: ns1.parklogic.com
rname: hostmaster.nationalyellowbook.com
serial: 2025050101
refresh: 3600
retry: 7200
expire: 1209600
minimum-ttl: 3600

Servidor de Correo
host: nationalyellowbook.com
class: IN
ttl: 16751
type: MX
pri: 10
target: mx156.hostedmxserver.com

Información TXT
host: nationalyellowbook.com
class: IN
ttl: 9551
type: TXT
txt: v=spf1 -all
entries: Array