Registro DMARC
v=DMARC1; p=reject; pct=100

Servidores DNS Principal (mname) y Secundario (rname)
host: maxsbookclub.com
class: IN
ttl: 1800
type: SOA
mname: alan.ns.cloudflare.com
rname: dns.cloudflare.com
serial: 2365573519
refresh: 10000
retry: 2400
expire: 604800
minimum-ttl: 1800

Información TXT
host: maxsbookclub.com
class: IN
ttl: 120
type: TXT
txt: v=spf1 a:my.drsum1.com ~all
entries: Array