Registro DMARC
v=DMARC1; p=reject; sp=reject; pct=100; fo=1; rua=mailto:dmarcagg@talk21.com; ruf=mailto:dmarcf@talk21.com

Servidores DNS Principal (mname) y Secundario (rname)
host: talk21.com
class: IN
ttl: 21600
type: SOA
mname: ns0.bt.net
rname: hostmaster.bt.net
serial: 2001121873
refresh: 28800
retry: 7200
expire: 604800
minimum-ttl: 86400

Servidor de Correo
host: talk21.com
class: IN
ttl: 90
type: MX
pri: 1
target: mx.lb.btinternet.com

Información TXT
host: talk21.com
class: IN
ttl: 90
type: TXT
txt: qw4f547hqpvyzk0z9k9kbh4rv12trjwt
entries: Array

Información TXT
host: talk21.com
class: IN
ttl: 90
type: TXT
txt: v=spf1 include:_spf.btinternet.com include:bt.com ~all
entries: Array

Información TXT
host: talk21.com
class: IN
ttl: 90
type: TXT
txt: xh98wyzwtjsz5skchtzxj4v274qbmvcd
entries: Array