Registro DMARC
v=DMARC1; p=reject; pct=100; rua=mailto:master@umailsmtp.com

Registro IPv4
host: viettienmed.com
class: IN
ttl: 360
type: A
ip: 210.245.8.133

Servidores DNS Principal (mname) y Secundario (rname)
host: viettienmed.com
class: IN
ttl: 3600
type: SOA
mname: nsbak.pavietnam.net
rname: hostmaster.viettienmed.com
serial: 2023011731
refresh: 14400
retry: 3600
expire: 1209600
minimum-ttl: 86400

Servidor de Correo
host: viettienmed.com
class: IN
ttl: 360
type: MX
pri: 5
target: smtp.umailsmtp.com

Información TXT
host: viettienmed.com
class: IN
ttl: 300
type: TXT
txt: v=spf1 include:dnsexit.com include:_spf.umailsmtp.com -all
entries: Array