Registro DMARC
v=DMARC1;p=reject;rua=mailto:webmaster@soriana.com;ruf=mailto:webmaster@soriana.com;fo=1

Servidores DNS Principal (mname) y Secundario (rname)
host: Sorianamercado.com
class: IN
ttl: 3600
type: SOA
mname: dns2.soriana.com
rname: hostmaster.soriana.com
serial: 7
refresh: 900
retry: 600
expire: 86400
minimum-ttl: 3600

Información TXT
host: Sorianamercado.com
class: IN
ttl: 3600
type: TXT
txt: v=spf1 -all
entries: Array