Registro DMARC
v=DMARC1;p=reject;rua=mailto:ratp@dr.dmarc.fr;ruf=mailto:ratp@dr.dmarc.fr;fo=1;

Servidores DNS Principal (mname) y Secundario (rname)
host: bus.fr
class: IN
ttl: 3600
type: SOA
mname: a1-157.akam.net
rname: hostmaster.ratp.fr
serial: 2024062602
refresh: 21600
retry: 3600
expire: 3600000
minimum-ttl: 3600

Servidor de Correo
host: bus.fr
class: IN
ttl: 3600
type: MX
pri: 10
target: odii-smtp.ratp.fr