Registro DMARC
v=DMARC1; p=reject; fo=1; rua=mailto:dmarc_rua@emaildefense.proofpoint.com; ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com

Servidores DNS Principal (mname) y Secundario (rname)
host: w3-ibm.com
class: IN
ttl: 3600
type: SOA
mname: dns1.p05.nsone.net
rname: webmaste.us.ibm.com
serial: 1731334979
refresh: 43200
retry: 7200
expire: 1209600
minimum-ttl: 3600

Servidor de Correo
host: w3-ibm.com
class: IN
ttl: 3600
type: MX
pri: 10
target: custmx.cscdns.net

Información TXT
host: w3-ibm.com
class: IN
ttl: 3600
type: TXT
txt: v=spf1 mx/24 -all
entries: Array