Registro DMARC
v=DMARC1; p=reject; fo=1; ri=3600; rua=mailto:dmarc_rua@emaildefense.proofpoint.com; ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com;

Registro IPv4
host: greensborospecialty.com
class: IN
ttl: 600
type: A
ip: 207.223.115.39

Servidores DNS Principal (mname) y Secundario (rname)
host: greensborospecialty.com
class: IN
ttl: 600
type: SOA
mname: dns1.cscdns.net
rname: hostmaster.cscdns.net
serial: 2020012203
refresh: 28800
retry: 7200
expire: 604800
minimum-ttl: 600

Servidor de Correo
host: greensborospecialty.com
class: IN
ttl: 600
type: MX
pri: 10
target: null.corpmailsvcs.com

Información TXT
host: greensborospecialty.com
class: IN
ttl: 600
type: TXT
txt: v=spf1 include:_spfv4.corpmailsvcs.com -all
entries: Array