indexo.dev

maintainablerails.com

.com crawl

First seen 2026-05-10 · Last seen 2026-05-10 · ok HTTP/1.1 200 1762 ms crawled 2026-05-16

US · 3.13.246.91 · AS16509 Amazon.com, Inc.

Reputation 95/100 weak security headers

Classifying

HTML metadata

Title
Maintainable Rails: Free Email Course for Developers | Give Your App Its Second Act
Description
A free email course for Ruby on Rails developers who want to evolve their existing apps without a rewrite. Learn practical ways to make your Rails app faster, safer, and ready for its second act.
Language
en

Open Graph

title
Maintainable Rails: Free Email Course for Developers | Give Your App Its Second Act
description
A free email course for Ruby on Rails developers who want to evolve their existing apps without a rewrite. Learn practical ways to make your Rails app faster, safer, and ready for its second act.

Technology

Server
openresty
CMS
Joomla
Analytics
  • Google Tag Manager
Fonts
  • Google Fonts
Third-party hosts loaded (7)
  • pages.convertkit.com×6
  • embed.filekitcdn.com×3
  • cdnjs.cloudflare.com×2
  • cdn.embedly.com×1
  • fonts.googleapis.com×1
  • fonts.gstatic.com×1
  • www.googletagmanager.com×1

Registration

Registrar
1API GmbH
Created
2020-03-30
Expires
2027-03-30 315 days left
Updated
2026-05-13
Name servers
  • ns1.dnsimple-edge.com
  • ns2.dnsimple-edge.net
  • ns3.dnsimple-edge.io
  • ns4.dnsimple-edge.org

DNS records live

NS
  • ns1.dnsimple-edge.com
  • ns2.dnsimple-edge.net
  • ns3.dnsimple-edge.io
  • ns4.dnsimple-edge.org

Email authentication no MX

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

Certificate (current)

R13
from 2026-05-05 to 2026-08-03
Expires in 76 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://maintainablerails.com/

findings
  • missing HSTS
  • missing Content Security Policy
  • missing frame protection
  • missing content type protection
  • missing Referrer Policy
  • missing Permissions Policy

Links to (4)

Linked from (1)