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

Registro IPv4
host: saintjohnscancer.org
class: IN
ttl: 7200
type: A
ip: 104.197.14.93

Servidores DNS Principal (mname) y Secundario (rname)
host: saintjohnscancer.org
class: IN
ttl: 7200
type: SOA
mname: u6059.providence.org
rname: domains.providence.org
serial: 2024081518
refresh: 10800
retry: 3600
expire: 2592000
minimum-ttl: 900