Registro DMARC
v=spf1 a:dns.firebirduk.com ~all

Registro IPv4
host: firebirduk.com
class: IN
ttl: 3600
type: A
ip: 138.128.170.210

Servidores DNS Principal (mname) y Secundario (rname)
host: firebirduk.com
class: IN
ttl: 3600
type: SOA
mname: dns.firebirduk.com
rname: hostmaster.firebirduk.com
serial: 1532029281
refresh: 43200
retry: 3600
expire: 604800
minimum-ttl: 3600

Servidor de Correo
host: firebirduk.com
class: IN
ttl: 3600
type: MX
pri: 0
target: mx.firebirduk.com

Información TXT
host: firebirduk.com
class: IN
ttl: 3600
type: TXT
txt: v=spf1 a:dns.firebirduk.com ~all
entries: Array