Registro DMARC
v=DMARC1; p=quarantine; pct=100; rua=mailto:postmaster@esth.cu;

Registro IPv4
host: esth.cu
class: IN
ttl: 21600
type: A
ip: 181.225.237.210

Servidores DNS Principal (mname) y Secundario (rname)
host: esth.cu
class: IN
ttl: 21600
type: SOA
mname: dns-ext.esth.cu
rname: yordan\@esth.cu
serial: 2023112903
refresh: 3600
retry: 600
expire: 1209600
minimum-ttl: 21600

Servidor de Correo
host: esth.cu
class: IN
ttl: 21600
type: MX
pri: 6
target: correo.esth.cu

Información TXT
host: esth.cu
class: IN
ttl: 21600
type: TXT
txt: v=spf1 mx a ptr ip4:181.225.237.210 -all
entries: Array