Registro DMARC
v=DMARC1; p=none; rua=mailto:dmarc@smtp-staging.mailtrap.net; ruf=mailto:dmarc@smtp-staging.mailtrap.net; rf=afrf; pct=100

Servidores DNS Principal (mname) y Secundario (rname)
host: wkabc.com
class: IN
ttl: 3601
type: SOA
mname: dns1.registrar-servers.com
rname: hostmaster.registrar-servers.com
serial: 1790107548
refresh: 43200
retry: 3600
expire: 604800
minimum-ttl: 3601