Registro DMARC
v=DMARC1;p=reject;fo=1;ri=3600;rua=mailto:metlife@rua.dmp.cisco.com;ruf=mailto:metlife@ruf.dmp.cisco.com

Servidores DNS Principal (mname) y Secundario (rname)
host: metrisk.co
class: IN
ttl: 79781
type: SOA
mname: ns1.markmonitor.com
rname: hostmaster.markmonitor.com
serial: 2021021801
refresh: 86400
retry: 3600
expire: 2592000
minimum-ttl: 172800

Información TXT
host: metrisk.co
class: IN
ttl: 79781
type: TXT
txt: v=spf1 -all
entries: Array