indexo.dev

lessonsinemail.com

.com crawl

First seen 2026-04-26 · Last seen 2026-05-16 · ok HTTP/1.1 200 2791 ms crawled 2026-05-19

US · 75.2.60.5 · AS16509 Amazon.com, Inc.

Reputation 94/100 dmarc monitor-only

Classifying

HTML metadata

Title
Lessons in email
Description
Lessons in developing emails. Email design systems to Dark mode and interactivity.
Language
en
Feeds

Open Graph

url
https://lessonsinemail.com
title
Lessons in email
description
Learn how to develop HTML email.

Technology

CDN
Netlify

Third-party hosts loaded (3)

  • cdn.simplecss.org×1
  • f.convertkit.com×1
  • kit.fontawesome.com×1

Registration

Registrar
Squarespace Domains II LLC
Created
2021-12-07
Expires
2026-12-07 201 days left
Updated
2025-11-22
Name servers
  • ns-cloud-c1.googledomains.com
  • ns-cloud-c2.googledomains.com
  • ns-cloud-c3.googledomains.com
  • ns-cloud-c4.googledomains.com

DNS records live

NS
  • ns-cloud-c1.googledomains.com
  • ns-cloud-c2.googledomains.com
  • ns-cloud-c3.googledomains.com
  • ns-cloud-c4.googledomains.com
MX
  • 10 mxa.mailgun.org
  • 10 mxb.mailgun.org

Email authentication partial

SPF
v=spf1 include:mailgun.org ~all
softfail (~all)
DMARC
v=DMARC1; p=none;
policy: none (monitoring only)
DKIM
no key found at common selectors

Certificate (current)

E7
from 2026-03-22 to 2026-06-20
Expires in 31 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 50/100 Checked live page: https://lessonsinemail.com/

present
  • strict-transport-security
findings
  • missing Content Security Policy
  • missing frame protection
  • missing content type protection
  • missing Referrer Policy
  • missing Permissions Policy
Header values
strict-transport-security
max-age=31536000

Links to (1)

Linked from (2)