Registro DMARC
v=DMARC1; p=reject; rua=mailto:dmarc@mainstream-llc.com; ruf=mailto:dmarc@mainstream-llc.com; sp=reject; aspf=s; adkim=r; pct=100; rf=afrf; ri=86400;

Registro IPv4
host: mainstream-llc.com
class: IN
ttl: 3600
type: A
ip: 142.202.190.103

Servidores DNS Principal (mname) y Secundario (rname)
host: mainstream-llc.com
class: IN
ttl: 3600
type: SOA
mname: dns.mainstream-llc.com
rname: hostmaster.mainstream-llc.com
serial: 1459174442
refresh: 43200
retry: 3600
expire: 604800
minimum-ttl: 3600

Servidor de Correo
host: mainstream-llc.com
class: IN
ttl: 3600
type: MX
pri: 0
target: mx.mainstream-llc.com

Información TXT
host: mainstream-llc.com
class: IN
ttl: 3600
type: TXT
txt: v=spf1 a:dns.mainstream-llc.com ~all
entries: Array