indexo.dev

htmlemailcheck.com

.com crawl

First seen 2026-04-26 · Last seen 2026-05-19 · ok HTTP/1.1 200 1788 ms crawled 2026-05-19

DE · 91.203.110.245 · AS45012 dogado GmbH

Reputation 100/100

Classifying

HTML metadata

Title
HTML Email Check – Preflight Validation for HTML Email
Description
Validate HTML emails for compliance, client compatibility, and best practices.
Language
en

Open Graph

url
https://www.htmlemailcheck.com/
title
HTML Email Check – Preflight Validation for HTML Email
description
Validate HTML emails for compliance, client compatibility, and best practices.

Technology

Server
nginx
Analytics
  • Google Tag Manager

Third-party hosts loaded (1)

  • www.googletagmanager.com×1

Social

Registration

Registrar
EPAG Domainservices GmbH
Created
2016-06-03
Expires
2026-06-03 13 days left
Updated
2025-07-15
Name servers
  • ns.checkdomain.de
  • ns2.checkdomain.de

DNS records live

NS
  • ns.checkdomain.de
  • ns2.checkdomain.de
MX
  • 10 mx03.secure-mailgate.com
  • 20 mx04.secure-mailgate.com
Verified for
  • Google

Email authentication strong

SPF
v=spf1 include:secure-mailgate.com ~all
softfail (~all)
DMARC
v=DMARC1; p=quarantine; rua=mailto:info@htmlemailcheck.com, mailto:email@htmlemailcheck.com; ruf=mailto:info@htmlemailcheck.com, mailto:email@htmlemailcheck.com; fo=1;
policy: quarantine
DKIM
no key found at common selectors

Certificates

Loading certificate

HTTP security headers

Header hygiene 100/100 Checked live page: https://www.htmlemailcheck.com/

present
  • strict-transport-security
  • content-security-policy
  • x-frame-options
  • x-content-type-options
  • referrer-policy
  • permissions-policy
Header values
referrer-policy
strict-origin-when-cross-origin
x-frame-options
SAMEORIGIN
permissions-policy
camera=(), microphone=(), geolocation=()
x-content-type-options
nosniff
content-security-policy
upgrade-insecure-requests
strict-transport-security
max-age=31536000; includeSubDomains; preload

Links to (3)

Linked from (1)