Registro DMARC
v=DMARC1;p=none;rua=mailto:newsletter@grammarbook.com

Registro IPv4
host: grammarbook.com
class: IN
ttl: 12753
type: A
ip: 150.238.96.148

Servidores DNS Principal (mname) y Secundario (rname)
host: grammarbook.com
class: IN
ttl: 14440
type: SOA
mname: ns1.myweblinx.net
rname: andy.weblinxinc.com
serial: 2025050700
refresh: 14400
retry: 400
expire: 3600000
minimum-ttl: 86400

Servidor de Correo
host: grammarbook.com
class: IN
ttl: 14400
type: MX
pri: 5
target: mail.grammarbook.com

Información TXT
host: grammarbook.com
class: IN
ttl: 14400
type: TXT
txt: google-site-verification=fyh__1JGmm_p0jkXTTOzeQqzFJXLZnu1WhqPYM3Dgts
entries: Array

Información TXT
host: grammarbook.com
class: IN
ttl: 14400
type: TXT
txt: v=spf1 ip4:150.238.96.148 include:nt16.myweblinx.net include:_spf.getresponse.com ~all
entries: Array