Registro DMARC
v=DMARC1; p=quarantine; fo=1; rua=mailto:dmarc_rua@emaildefense.proofpoint.com; ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com

Servidores DNS Principal (mname) y Secundario (rname)
host: xpologistics.biz
class: IN
ttl: 21600
type: SOA
mname: inpau10265.xpo.com
rname: hostmaster.xpo.com
serial: 9
refresh: 10800
retry: 3600
expire: 2419200
minimum-ttl: 900