Registro DMARC
v=spf1 a mx a:relay1.iserv.eu a:relay2.iserv.eu a:relay3.iserv.eu a:relaybs.iserv.eu ?all

Registro DMARC
v=spf1 a mx a:relay1.iserv.eu a:relay2.iserv.eu a:relay3.iserv.eu a:relaybs.iserv.eu ?all

Registro IPv4
host: rwb-essen.de
class: IN
ttl: 90
type: A
ip: 185.150.49.156

Servidores DNS Principal (mname) y Secundario (rname)
host: rwb-essen.de
class: IN
ttl: 3600
type: SOA
mname: ns1.iserv.eu
rname: hostmaster.iserv.eu
serial: 305686221
refresh: 86400
retry: 10800
expire: 3600000
minimum-ttl: 60

Servidor de Correo
host: rwb-essen.de
class: IN
ttl: 3600
type: MX
pri: 50
target: offline.iserv.eu

Servidor de Correo
host: rwb-essen.de
class: IN
ttl: 3600
type: MX
pri: 10
target: rwb-essen.de

Información TXT
host: rwb-essen.de
class: IN
ttl: 3600
type: TXT
txt: apple-domain-verification=VBFMYDV7jenGVx2V
entries: Array

Información TXT
host: rwb-essen.de
class: IN
ttl: 3600
type: TXT
txt: v=spf1 a mx a:relay1.iserv.eu a:relay2.iserv.eu a:relay3.iserv.eu a:relaybs.iserv.eu ?all
entries: Array