Registro DMARC
v=DMARC1; p=none; rua=mailto:dmarc-report@tm-21.com

Servidores DNS Principal (mname) y Secundario (rname)
host: bbbk.net
class: IN
ttl: 900
type: SOA
mname: ns-1875.awsdns-42.co.uk
rname: awsdns-hostmaster.amazon.com
serial: 1
refresh: 7200
retry: 900
expire: 1209600
minimum-ttl: 86400

Servidor de Correo
host: bbbk.net
class: IN
ttl: 300
type: MX
pri: 30
target: mail.tm-21.com

Información TXT
host: bbbk.net
class: IN
ttl: 300
type: TXT
txt: v=spf1 +mx +include:spf.tm-21.com -all
entries: Array