Registro DMARC
v=DMARC1; p=reject

Registro IPv4
host: tfsource.de
class: IN
ttl: 900
type: A
ip: 217.19.248.132

Servidores DNS Principal (mname) y Secundario (rname)
host: tfsource.de
class: IN
ttl: 17349
type: SOA
mname: dns1.safenames.com
rname: hostmaster.safenames.net
serial: 2019112000
refresh: 28800
retry: 1800
expire: 604800
minimum-ttl: 3600

Información TXT
host: tfsource.de
class: IN
ttl: 3600
type: TXT
txt: v=spf1 -all
entries: Array