Registro DMARC
v=DMARC1; p=reject; pct=100; rua=mailto:re+kvnosxqvppz@dmarc.postmarkapp.com; sp=reject; aspf=r;

Registro IPv4
host: substack.com
class: IN
ttl: 300
type: A
ip: 104.18.33.245

Registro IPv4
host: substack.com
class: IN
ttl: 300
type: A
ip: 172.64.154.11

Servidores DNS Principal (mname) y Secundario (rname)
host: substack.com
class: IN
ttl: 1800
type: SOA
mname: ali.ns.cloudflare.com
rname: dns.cloudflare.com
serial: 2333579512
refresh: 10000
retry: 2400
expire: 604800
minimum-ttl: 1800

Servidor de Correo
host: substack.com
class: IN
ttl: 300
type: MX
pri: 10
target: mxb.mailgun.org

Servidor de Correo
host: substack.com
class: IN
ttl: 300
type: MX
pri: 10
target: mxa.mailgun.org

Información TXT
host: substack.com
class: IN
ttl: 300
type: TXT
txt: google-site-verification=vQEKLOUDfKNOQAv9W3EUMiRD6e5ibAEPhc2yCzP7big
entries: Array

Información TXT
host: substack.com
class: IN
ttl: 300
type: TXT
txt: facebook-domain-verification=8vbxp2ntmkudc6is3h5r840c9fwo7f
entries: Array

Información TXT
host: substack.com
class: IN
ttl: 300
type: TXT
txt: google-site-verification=FfNIQIxsRHpj3Y7E_d3N6GFqGgWDZ-sfYojqCilwtqE
entries: Array

Información TXT
host: substack.com
class: IN
ttl: 300
type: TXT
txt: google-site-verification=DAkdykID6WqQM6tT7IfSu9_uB7-qIdB039MA_C3T3eA
entries: Array

Información TXT
host: substack.com
class: IN
ttl: 300
type: TXT
txt: google-site-verification=SXEl7_p4SBszcanSWwVc_3-RFky80c0-94janbeeWI4
entries: Array

Información TXT
host: substack.com
class: IN
ttl: 300
type: TXT
txt: v=spf1 include:_spf.google.com include:mailgun.org include:mail.zendesk.com ~all
entries: Array

Registro IPv6
host: substack.com
class: IN
ttl: 300
type: AAAA
ipv6: 2606:4700:4400::6812:21f5

Registro IPv6
host: substack.com
class: IN
ttl: 300
type: AAAA
ipv6: 2606:4700:4400::ac40:9a0b