Registro DMARC
v=DMARC1; p=reject; rua=mailto:dmarc_rua@emaildefense.proofpoint.com; ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com

Registro IPv4
host: northsidecardiologyradialcath.com
class: IN
ttl: 6561
type: A
ip: 208.91.197.27

Servidores DNS Principal (mname) y Secundario (rname)
host: northsidecardiologyradialcath.com
class: IN
ttl: 6561
type: SOA
mname: NS49.WORLDNIC.com
rname: namehost.WORLDNIC.com
serial: 122112313
refresh: 10800
retry: 3600
expire: 604800
minimum-ttl: 3600