Registro DMARC
v=spf1 a mx ip4:23.22.67.211 include:relay.mailchannels.net -all

Registro IPv4
host: lieulieuduong.org
class: IN
ttl: 1200
type: A
ip: 23.22.67.211

Servidores DNS Principal (mname) y Secundario (rname)
host: lieulieuduong.org
class: IN
ttl: 21600
type: SOA
mname: ns1.turbify.com
rname: webmaster.turbify.com
serial: 2023071001
refresh: 3600
retry: 1800
expire: 1209600
minimum-ttl: 86400

Servidor de Correo
host: lieulieuduong.org
class: IN
ttl: 1200
type: MX
pri: 30
target: mx-biz.mail.am0.yahoodns.net

Servidor de Correo
host: lieulieuduong.org
class: IN
ttl: 1200
type: MX
pri: 20
target: mx-biz.mail.am0.yahoodns.net