Registro DMARC
v=DMARC1; p=none; aspf=r; adkim=r;

Servidores DNS Principal (mname) y Secundario (rname)
host: centroluce.info
class: IN
ttl: 14400
type: SOA
mname: ns1.siteground.net
rname: admins.siteground.com
serial: 129
refresh: 10800
retry: 3600
expire: 1209600
minimum-ttl: 3600

Información TXT
host: centroluce.info
class: IN
ttl: 21600
type: TXT
txt: v=spf1 +a +mx include:centroluce.info.spf.auto.dnssmarthost.net ~all
entries: Array