Registro DMARC
v=DMARC1; p=none;

Registro IPv4
host: thecastledoctrine.net
class: IN
ttl: 86400
type: A
ip: 172.236.101.25

Servidores DNS Principal (mname) y Secundario (rname)
host: thecastledoctrine.net
class: IN
ttl: 86400
type: SOA
mname: ns1.linode.com
rname: jasonrohrer.fastmail.fm
serial: 2021000006
refresh: 14400
retry: 14400
expire: 1209600
minimum-ttl: 86400

Servidor de Correo
host: thecastledoctrine.net
class: IN
ttl: 86400
type: MX
pri: 10
target: mail.thecastledoctrine.net