Servidores DNS Principal (mname) y Secundario (rname)
host: att.biz
class: IN
ttl: 21600
type: SOA
mname: ns0.attdns.com
rname: eiss-dns.att.com
serial: 2025050701
refresh: 3600
retry: 1800
expire: 2592000
minimum-ttl: 300

Servidor de Correo
host: att.biz
class: IN
ttl: 21600
type: MX
pri: 100
target: mx2c45.carrierzone.com

Servidor de Correo
host: att.biz
class: IN
ttl: 21600
type: MX
pri: 110
target: mx3c45.carrierzone.com

Servidor de Correo
host: att.biz
class: IN
ttl: 21600
type: MX
pri: 10
target: mx1c45.carrierzone.com

Servidor de Correo
host: att.biz
class: IN
ttl: 21600
type: MX
pri: 120
target: mx4c45.carrierzone.com