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: easternbankcorp.site
class: IN
ttl: 3600
type: SOA
mname: ns1.lexsynergy.net
rname: dnsmaster.lexsynergy.com
serial: 3
refresh: 302400
retry: 3600
expire: 1209600
minimum-ttl: 600