indexo.dev

penbook.app

.app crawl

First seen 2026-04-12 · Last seen 2026-05-07 · ok HTTP/1.1 200 872 ms crawled 2026-05-19

US · 151.101.3.7 · AS54113 Fastly, Inc.

Reputation 89/100 weak security headers dmarc monitor-only

sector media news type blog

HTML metadata

Title
Penbook
Description
Paper, perfected for iPad.
Language
en
Generator
Ghost 6.39
Canonical
https://penbook.app/
Feeds

Open Graph

url
https://penbook.app/
title
Penbook
site name
Penbook
description
Paper, perfected for iPad.

Technology

Server
openresty
CMS
Ghost

Third-party hosts loaded (2)

  • storage.ghost.io×5
  • cdn.jsdelivr.net×2

DNS records live

NS
  • coby.ns.cloudflare.com
  • dayana.ns.cloudflare.com
MX
  • 10 in1-smtp.messagingengine.com
  • 20 in2-smtp.messagingengine.com
Verified for
  • Google
  • Pinterest

Email authentication partial

SPF
v=spf1 include:spf.messagingengine.com ?all
neutral (?all)
DMARC
v=DMARC1; p=none;
policy: none (monitoring only)
DKIM
no key found at common selectors

Certificate (current)

Certainly Intermediate R1
from 2026-05-15 to 2026-06-14
Expires in 25 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://penbook.app/

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

Links to (1)

Linked from (1)