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

Servidores DNS Principal (mname) y Secundario (rname)
host: schreiber-foods.net
class: IN
ttl: 3600
type: SOA
mname: dns1.p01.nsone.net
rname: hostmaster.nsone.net
serial: 1666285192
refresh: 43200
retry: 7200
expire: 1209600
minimum-ttl: 3600