Registro DMARC
v=spf1 include:mail.39.net

Registro IPv4
host: 39.net
class: IN
ttl: 600
type: A
ip: 115.231.220.253

host: 39.net
class: IN
ttl: 600
type: CNAME
target: systemdf.39.net

Información TXT
host: systemdf.39.net
class: IN
ttl: 600
type: TXT
txt: v=spf1 include:mail.39.net
entries: Array