Registro DMARC
v=DMARC1; p=reject; adkim=s; aspf=s; pct=100;

Servidores DNS Principal (mname) y Secundario (rname)
host: next.com.co
class: IN
ttl: 22255
type: SOA
mname: ns1.markmonitor.com
rname: hostmaster.markmonitor.com
serial: 2026070903
refresh: 86400
retry: 3600
expire: 2592000
minimum-ttl: 172800

Información TXT
host: next.com.co
class: IN
ttl: 22255
type: TXT
txt: v=spf1 -all
entries: Array