Registro DMARC
v=DMARC1; p=none; fo=1; rua=mailto:dmarc_rua@emaildefense.proofpoint.com; ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com

Servidores DNS Principal (mname) y Secundario (rname)
host: att-mail.com
class: IN
ttl: 28800
type: SOA
mname: ns0.attdns.com
rname: eiss-dns.att.com
serial: 2024110501
refresh: 3600
retry: 1800
expire: 2592000
minimum-ttl: 300

Información TXT
host: att-mail.com
class: IN
ttl: 28800
type: TXT
txt: v=spf1 -all
entries: Array