Registro DMARC
v=DMARC1; p=none;

Servidores DNS Principal (mname) y Secundario (rname)
host: howtodine.com
class: IN
ttl: 21600
type: SOA
mname: ns1019.ui-dns.org
rname: hostmaster.1und1.com
serial: 2017060106
refresh: 28800
retry: 7200
expire: 604800
minimum-ttl: 600

Servidor de Correo
host: howtodine.com
class: IN
ttl: 3600
type: MX
pri: 10
target: mx00.ionos.de

Servidor de Correo
host: howtodine.com
class: IN
ttl: 3600
type: MX
pri: 10
target: mx01.ionos.de

Información TXT
host: howtodine.com
class: IN
ttl: 3600
type: TXT
txt: v=spf1 include:_spf-eu.ionos.com ~all
entries: Array