Registro DMARC
v=DMARC1; p=reject

Servidores DNS Principal (mname) y Secundario (rname)
host: mannsystems.net
class: IN
ttl: 170123
type: SOA
mname: ns1.he.net
rname: hostmaster.he.net
serial: 2025103003
refresh: 86400
retry: 3600
expire: 1209600
minimum-ttl: 3600

Servidor de Correo
host: mannsystems.net
class: IN
ttl: 83723
type: MX
pri: 20
target: mailsec.protonmail.ch

Servidor de Correo
host: mannsystems.net
class: IN
ttl: 83723
type: MX
pri: 10
target: mail.protonmail.ch

Información TXT
host: mannsystems.net
class: IN
ttl: 83723
type: TXT
txt: protonmail-verification=fc3a394c523dcc3345c0790f90c959567f7528ad
entries: Array

Información TXT
host: mannsystems.net
class: IN
ttl: 83723
type: TXT
txt: v=spf1 include:_spf.protonmail.ch mx ~all
entries: Array