Servidores DNS Principal (mname) y Secundario (rname)
host: marcumdigital.com
class: IN
ttl: 85484
type: SOA
mname: ns1.markmonitor.com
rname: hostmaster.markmonitor.com
serial: 2026082405
refresh: 86400
retry: 3600
expire: 2592000
minimum-ttl: 172800

Información TXT
host: marcumdigital.com
class: IN
ttl: 2685
type: TXT
txt: v=spf1 -all
entries: v=spf1 -all