Registro DMARC
v=spf1 include:_spf_ipv4.netflix.com include:_spf.google.com include:amazonses.com include:_spf.salesforce.com -all

Información TXT
host: i.netflix.com
class: IN
ttl: 300
type: TXT
txt: v=spf1 include:_spf_ipv4.netflix.com include:_spf.google.com include:amazonses.com include:_spf.salesforce.com -all
entries: Array