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: mypresidents-choice.com
class: IN
ttl: 21600
type: SOA
mname: ns1.webnames.ca
rname: postmaster.webnames.ca
serial: 1664839821
refresh: 21600
retry: 180
expire: 1209600
minimum-ttl: 3600