Registro DMARC
v=DMARC1; p=reject; sp=reject; rua=mailto:dmarc_reports@mail.mil

Servidores DNS Principal (mname) y Secundario (rname)
host: dod.mil
class: IN
ttl: 43200
type: SOA
mname: dns-mas-a1-t.pentagon.mil
rname: osd\.pentagon\.jsp\.list\.core-dns.mail.mil
serial: 2006080002
refresh: 900
retry: 90
expire: 2592000
minimum-ttl: 3600