Registro DMARC
v=spf1 a mx ip4:162.243.28.67 ip4:162.243.37.107 include:sendgrid.net ~all

Registro IPv4
host: litcares.com
class: IN
ttl: 210
type: A
ip: 157.230.64.41

Servidores DNS Principal (mname) y Secundario (rname)
host: litcares.com
class: IN
ttl: 1800
type: SOA
mname: ns1.digitalocean.com
rname: hostmaster.litcares.com
serial: 1700381722
refresh: 10800
retry: 3600
expire: 604800
minimum-ttl: 1800