Registro DMARC
v=DMARC1; p=reject

Registro IPv4
host: thehealthstudents.com
class: IN
ttl: 90
type: A
ip: 54.237.57.21

Servidores DNS Principal (mname) y Secundario (rname)
host: thehealthstudents.com
class: IN
ttl: 3600
type: SOA
mname: ns1.namepros-dns.com
rname: dns.namepros.com
serial: 12705131
refresh: 3600
retry: 600
expire: 1209600
minimum-ttl: 60

Información TXT
host: thehealthstudents.com
class: IN
ttl: 90
type: TXT
txt: v=spf1 -all
entries: Array