Registro DMARC
v=DMARC1; p=none; rua=mailto:dmarc_rua@emaildefense.proofpoint.com,mailto:dmarc_agg@vali.email; ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com; fo=1

Servidores DNS Principal (mname) y Secundario (rname)
host: apaco.ab.ca
class: IN
ttl: 21600
type: SOA
mname: pdns106.ultradns.com
rname: networkadmins.apsc.ca
serial: 2017112918
refresh: 28800
retry: 7200
expire: 604800
minimum-ttl: 3600

Información TXT
host: apaco.ab.ca
class: IN
ttl: 21600
type: TXT
txt: v=spf1 -all
entries: Array