Registro DMARC
v=spf1 a mx ip4:20.121.42.92 include:relay.mailchannels.net -all

Registro IPv4
host: lieulieuduong.org
class: IN
ttl: 120
type: A
ip: 20.121.42.92

Servidores DNS Principal (mname) y Secundario (rname)
host: lieulieuduong.org
class: IN
ttl: 3600
type: SOA
mname: ns1.turbify.com
rname: hostmaster.lieulieuduong.org
serial: 2026021802
refresh: 10800
retry: 3600
expire: 604800
minimum-ttl: 3600

Servidor de Correo
host: lieulieuduong.org
class: IN
ttl: 120
type: MX
pri: 20
target: mx-biz.mail.am0.yahoodns.net

Servidor de Correo
host: lieulieuduong.org
class: IN
ttl: 120
type: MX
pri: 30
target: mx-biz.mail.am0.yahoodns.net