Registro DMARC
v=DMARC1; p=none

Registro IPv4
host: learning.envirn.org
class: IN
ttl: 995
type: A
ip: 185.204.15.59

Servidor de Correo
host: learning.envirn.org
class: IN
ttl: 996
type: MX
pri: 10
target: mx1.us.opalstack.com

Servidor de Correo
host: learning.envirn.org
class: IN
ttl: 996
type: MX
pri: 10
target: mx2.us.opalstack.com

Información TXT
host: learning.envirn.org
class: IN
ttl: 996
type: TXT
txt: v=spf1 mx include:spf.opalstack.com include:_spf.google.com include:salsalabs.org  include:_spf.mosaicmanaged.com  ~all
entries: Array