Registro DMARC
v=DMARC1; p=none; aspf=r; adkim=r;

Registro IPv4
host: harvardclasses.com
class: IN
ttl: 13316
type: A
ip: 35.213.188.238

Servidores DNS Principal (mname) y Secundario (rname)
host: harvardclasses.com
class: IN
ttl: 6116
type: SOA
mname: ns1.siteground.net
rname: admins.siteground.com
serial: 8
refresh: 10800
retry: 3600
expire: 604800
minimum-ttl: 3600

Servidor de Correo
host: harvardclasses.com
class: IN
ttl: 13316
type: MX
pri: 10
target: mx10.antispam.mailspamprotection.com

Servidor de Correo
host: harvardclasses.com
class: IN
ttl: 13316
type: MX
pri: 20
target: mx20.antispam.mailspamprotection.com

Servidor de Correo
host: harvardclasses.com
class: IN
ttl: 13316
type: MX
pri: 30
target: mx30.antispam.mailspamprotection.com

Información TXT
host: harvardclasses.com
class: IN
ttl: 13316
type: TXT
txt: v=spf1 +a +mx include:harvardclasses.com.spf.auto.dnssmarthost.net ~all
entries: Array