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Total

DNS

Email

Security

Network

100

Availability

Domaincmail20.com

IPv42

IPv60

MX records2

StatusActive

Domain technical report

An error has occurred

cmail20.com

Generated: 2026-08-09T13:15:02-05:00 · Cached result

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IPv42

IPv60

MX2

NS5

DiagnosticsMain findings and recommendations

✓

IPv4 (A)30 / 30 pts · Dns

2 IPv4 address(es) detected.

IPv6 (AAAA)0 / 10 pts · Dns

0 IPv6 address(es) detected.

✓

Name server redundancy20 / 20 pts · Dns

5 NS record(s); 2 or more required.

✓

SOA record10 / 10 pts · Dns

Authoritative zone record.

DNSSEC chain0 / 15 pts · Dns

Both DS and DNSKEY are required.

✓

CAA policy5 / 5 pts · Dns

Certificate authority restriction.

✓

DNS propagation10 / 10 pts · Dns

Agreement between public resolvers.

✓

MX records20 / 20 pts · Mail

2 MX record(s).

✓

SPF25 / 25 pts · Mail

SPF policy published.

✓

DMARC25 / 25 pts · Mail

DMARC policy published.

DKIM0 / 20 pts · Mail

No tested DKIM selector responded.

MTA-STS0 / 5 pts · Mail

Mail transport policy.

TLS-RPT0 / 5 pts · Mail

TLS reporting policy.

✓

Valid TLS certificate55 / 55 pts · Security

3 day(s) remaining.

Certificate lifetime2 / 10 pts · Security

Full points require at least 30 days remaining.

HTTP security headers8 / 35 pts · Security

2 of 9 evaluated headers detected.

✓

PTR reverse DNS30 / 30 pts · Network

PTR: ec2-54-193-52-199.us-west-1.compute.amazonaws.com

✓

IPv4 diversity35 / 35 pts · Network

Two or more IPv4 addresses receive full points.

IPv6 connectivity0 / 35 pts · Network

AAAA availability.

✓

DNS resolution40 / 40 pts · Availability

At least one address family must resolve.

✓

HTTP response40 / 40 pts · Availability

HTTP/2 200

✓

HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

2 record(s)

54.193.52.199
54.241.206.144

AAAA

0 record(s)

—

Not configured

CNAME

0 record(s)

—

Not configured

MX

2 record(s)

5 mx20.inbound.createsend.com.
5 mx21.inbound.createsend.com.

TXT

4 record(s)

"yahoo-verification-key=14fFKmwIEMLpWCAUfQT4Dzh9SKtEbbiSKR10SV1iAFU="
"v=spf1 ip4:103.28.42.0/24 ip4:27.126.146.0/24 ip4:146.88.28.0/24 ip4:163.47.180.0/22 ip4:203.55.21.0/24 ip4:204.75.142.0/24 ~all"
"google-site-verification=OQuPpk6X8DwderV3xCqs6OFY3LHTx0wK9ZieHlBkGV4"
"google-site-verification=OH5mKdkmGwyRzbVdmZLm2gteQVz-efh3thJH4cw6Vyk"

NS

5 record(s)

ns2.dnsmadeeasy.com.
ns3.dnsmadeeasy.com.
ns4.dnsmadeeasy.com.
ns1.dnsmadeeasy.com.
ns0.dnsmadeeasy.com.

SOA

1 record(s)

ns10.digicertdns.com. dns.digicertdns.com. 2009010129 43200 3600 1209600 180

CAA

1 record(s)

0 issue "digicert.com"

DS

0 record(s)

—

Not configured

DNSKEY

0 record(s)

—

Not configured

RRSIG

0 record(s)

—

Not configured

NSEC

0 record(s)

—

Not configured

NSEC3

0 record(s)

—

Not configured

SRV

0 record(s)

—

Not configured

NAPTR

0 record(s)

—

Not configured

TLSA

0 record(s)

—

Not configured

SSHFP

0 record(s)

—

Not configured

SPF

Configured

v=spf1 ip4:103.28.42.0/24 ip4:27.126.146.0/24 ip4:146.88.28.0/24 ip4:163.47.180.0/22 ip4:203.55.21.0/24 ip4:204.75.142.0/24 ~all

DMARC

Configured

v=DMARC1; p=none; pct=100; fo=1; ri=3600; rua=mailto:e5bffb4e@inbox.ondmarc.com; ruf=mailto:e5bffb4e@inbox.ondmarc.com;

DKIM

Not found

—

Not configured

Analyzed webpageMetadata and HTTP response

Title and description

Extracted

Title

An error has occurred

Description

Final URL

https://cmail20.com/

HTTP status

200

HTTP

Status

HTTP/2 200

Final URL

https://cmail20.com/

Version

Server

openresty/1.27.1.2

X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

DigiCert Inc

*.createsend1.com

Valid from

2025-08-10T19:00:00-05:00

Valid until

2026-08-12T18:59:59-05:00

Days remaining

Protocol

TLSv1.2

Cipher

ECDHE-RSA-AES128-GCM-SHA256

Security headers

2 active

—

HSTSNot detected

—

Content Security PolicyNot detected

✓

X-Content-Type-OptionsImplemented

—

X-Frame-OptionsNot detected

✓

Referrer PolicyImplemented

—

Permissions PolicyNot detected

—

Cross-Origin-Opener-PolicyNot detected

—

Cross-Origin-Embedder-PolicyNot detected

—

Cross-Origin-Resource-PolicyNot detected

DNS propagationComparison across public resolvers

Public resolver comparison

Consistent

✓

Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency

Google

8.8.8.8

54.193.52.199, 54.241.206.144

98,45 ms

Cloudflare

1.1.1.1

54.193.52.199, 54.241.206.144

52,62 ms

Quad9

9.9.9.9

54.193.52.199, 54.241.206.144

54,86 ms

OpenDNS

208.67.222.222

54.193.52.199, 54.241.206.144

28,96 ms

AdGuard

94.140.14.14

54.193.52.199, 54.241.206.144

146,13 ms

IP, geolocation and ASNAssociated network information

54.193.52.199

No data

success

country

region

city

asn

organization

isp

54.241.206.144

No data

success

country

region

city

asn

organization

isp

Visitor information

Visitor

216.73.217.62

reverse

country

country_code

region

city

latitude

longitude

isp

organization

asn

timezone

browser

Other

language

user_agent

Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

is_bot

Yes

cloudflare

SMTPEmail port connectivity

mx20.inbound.createsend.com

Port 25: Closed/unreachable - 8.4 ms - 
Port 465: Closed/unreachable - 4020.7 ms - 
Port 587: Closed/unreachable - 51.8 ms - Connected to inbound.creatsend.com.

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