Registro DMARC
v=DMARC1; p=reject;

Servidores DNS Principal (mname) y Secundario (rname)
host: bcogeneral.com
class: IN
ttl: 600
type: SOA
mname: dns1.bgeneral.com
rname: admin.bgeneral.com
serial: 3
refresh: 10800
retry: 900
expire: 1814400
minimum-ttl: 10800