Registro DMARC
v=DMARC1;p=reject;pct=100;fo=1;ri=86400;rua=mailto:ruabcol@todo1.com;ruf=mailto:rufbcol@todo1.com,mailto:dmarc@bancolombia.com.co

Servidores DNS Principal (mname) y Secundario (rname)
host: bancolombia.info
class: IN
ttl: 3600
type: SOA
mname: ns3.bancolombia.com
rname: dominios.bancolombia.com.co
serial: 17
refresh: 900
retry: 600
expire: 86400
minimum-ttl: 3600

Información TXT
host: bancolombia.info
class: IN
ttl: 3600
type: TXT
txt: v=spf1 ip4:201.221.124.82 -all
entries: Array