indexo.dev

startuplessonslearned.com

.com crawl

First seen 2026-04-22 · Last seen 2026-05-16 · ok HTTP/1.1 200 7232 ms crawled 2026-05-16

US · 216.239.38.21 · AS15169 Google LLC

Reputation 87/100 weak security headers no dmarc policy

Classifying

HTML metadata

Title
Lessons Learned
Generator
blogger
Canonical
http://www.startuplessonslearned.com/
Feeds

Open Graph

url
http://www.startuplessonslearned.com/
title
Lessons Learned
description
by Eric Ries

Technology

Server
GSE
CMS
Gatsby
Ads
  • Outbrain
Social widgets
  • Twitter Widget
Third-party hosts loaded (15)
  • feeds.feedburner.com×5
  • platform.twitter.com×5
  • resources.blogblog.com×5
  • www.blogger.com×5
  • www.facebook.com×5
  • lh3.googleusercontent.com×3
  • apis.google.com×2
  • twitter.com×2
  • widgets.outbrain.com×2
  • blogger.googleusercontent.com×1
  • embeds.beehiiv.com×1
  • load.sumome.com×1
  • static.ak.connect.facebook.com×1
  • ws.amazon.com×1
  • www.hellobar.com×1

Social

Registration

Registrar
GoDaddy.com, LLC
Created
2009-03-17
Expires
2027-03-17 302 days left
Updated
2026-03-18
Name servers
  • ns21.domaincontrol.com
  • ns22.domaincontrol.com

DNS records live

NS
  • ns21.domaincontrol.com
  • ns22.domaincontrol.com
MX
  • 10 aspmx.l.google.com
  • 20 alt1.aspmx.l.google.com
  • 30 alt2.aspmx.l.google.com
  • 40 aspmx2.googlemail.com
  • 50 aspmx3.googlemail.com
TXT
  • 0

Email authentication weak

SPF
not published
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

WR3
from 2026-04-01 to 2026-06-30
Expires in 42 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 40/100 Checked live page: https://www.startuplessonslearned.com/

present
  • x-content-type-options
findings
  • missing HSTS
  • missing Content Security Policy
  • missing frame protection
  • missing Referrer Policy
  • missing Permissions Policy
Header values
x-content-type-options
nosniff

Links to (39)

Linked from (1)