Registro DMARC
v=DMARC1; p=reject; rua=mailto:dmarc_agg@vali.email

Servidores DNS Principal (mname) y Secundario (rname)
host: cnt.com
class: IN
ttl: 3600
type: SOA
mname: lvn-exdns-1.broadcom.net
rname: domains\.admin.broadcom.com
serial: 2013053155
refresh: 10800
retry: 3600
expire: 2592000
minimum-ttl: 300