Registro DMARC
v=spf1 a mx ip4:128.100.72.156/32 -all

Registro IPv4
host: Utii.sa.utoronto.ca
class: IN
ttl: 300
type: A
ip: 128.100.72.156

Servidor de Correo
host: Utii.sa.utoronto.ca
class: IN
ttl: 86400
type: MX
pri: 0
target: mail.sa.utoronto.ca

Información TXT
host: Utii.sa.utoronto.ca
class: IN
ttl: 86400
type: TXT
txt: v=spf1 a mx ip4:128.100.72.156/32 -all
entries: Array