Registro DMARC
v=spf1 include:_spf.google.com  ip4:192.237.244.119 ip6:2001:4801:7822:101:be76:4eff:fe10:f49d a:do.redeletras.com ~all

Registro IPv4
host: redeletras.com.ar
class: IN
ttl: 14400
type: A
ip: 192.237.244.119

Servidores DNS Principal (mname) y Secundario (rname)
host: redeletras.com.ar
class: IN
ttl: 14400
type: SOA
mname: ns1.dreamhost.com
rname: hostmaster.dreamhost.com
serial: 2018092903
refresh: 17909
retry: 1800
expire: 1814400
minimum-ttl: 14400

Servidor de Correo
host: redeletras.com.ar
class: IN
ttl: 14400
type: MX
pri: 10
target: smtp.redeletras.com