Servidores DNS Principal (mname) y Secundario (rname)
host: byr.edu.cn
class: IN
ttl: 7200
type: SOA
mname: ns.byr.edu.cn
rname: admin.example.com
serial: 2100000097
refresh: 10800
retry: 900
expire: 604800
minimum-ttl: 86400

Servidor de Correo
host: byr.edu.cn
class: IN
ttl: 3600
type: MX
pri: 10
target: mx2.forwardemail.net

Servidor de Correo
host: byr.edu.cn
class: IN
ttl: 3600
type: MX
pri: 10
target: mx1.forwardemail.net

Información TXT
host: byr.edu.cn
class: IN
ttl: 3600
type: TXT
txt: v=spf1 a mx include:spf.forwardemail.net -all
entries: Array

Información TXT
host: byr.edu.cn
class: IN
ttl: 3600
type: TXT
txt: forward-email=frederic.dt.twh+byr.edu.cn@gmail.com
entries: Array