leanpub.com

.com crawl

First seen 2026-04-11 · Last seen 2026-05-19 · ok HTTP/1.1 200 415 ms crawled 2026-05-18

US · 13.33.235.30 · AS16509 Amazon.com, Inc.

Reputation 94/100 dmarc monitor-only

Classifying

HTML metadata

Title: Leanpub: Publish Early, Publish Often
Description: Leanpub is a platform for authors to write, publish and sell in-progress and completed ebooks and online courses.
Language: en

Open Graph

url: https://leanpub.com/
title: Leanpub: Publish Early, Publish Often
locale: en_US
site name: Leanpub
description: Leanpub is a platform for authors to write, publish and sell in-progress and completed ebooks and online courses.

Technology

CDN: Amazon CloudFront
Server: CloudFront

Analytics

Google Tag Manager

Social widgets

YouTube Embed

Third-party hosts loaded (8)

d2sofvawe08yqg.cloudfront.net×30
s3.amazonaws.com×29
d2o9wnd5wywfpj.cloudfront.net×10
dclrlzd4gl55u.cloudfront.net×10
d39qdlcrvnra4b.cloudfront.net×4
secure.gravatar.com×1
www.googletagmanager.com×1
www.youtube.com×1

Social

Contact

Address: st Painful Compliment (2026

Registration

Registrar

DreamHost, LLC

Created

2009-08-25

Expires

2026-08-25 97 days left

Updated

2024-07-06

Name servers

ns-1390.awsdns-45.org
ns-1693.awsdns-19.co.uk
ns-389.awsdns-48.com
ns-576.awsdns-08.net

DNS records live

NS

ns-1390.awsdns-45.org
ns-1693.awsdns-19.co.uk
ns-389.awsdns-48.com
ns-576.awsdns-08.net

MX

0 aspmx.l.google.com

TXT

google-site-verification=zoRXbAIm861EKd5VTW9pSjE9SmF0G12EWQit--QX-RI

Email authentication partial

SPF

v=spf1 a mx include:spf.mtasv.net include:spf.mail.intercom.io include:servers.mcsv.net include:_spf.google.com -all

strict (-all)

DMARC

v=DMARC1; p=none; pct=100; rua=mailto:re+yy4bkel2e8n@dmarc.postmarkapp.com; sp=none; aspf=r;

policy: none (monitoring only) · sp=none

DKIM

k1: k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDbNrX2cY/GUKIFx2G/1I00ftdAj713WP9AQ1xir85i89sA2guU0ta4UX1Xzm06XIU6iBP41VwmPwBGRNofhBVR+e6WHUo…

selectors probed

Certificate (current)

Amazon RSA 2048 M01

from 2025-12-20 to 2027-01-19

Expires in 244 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 95/100 Checked live page: https://leanpub.com/

present

strict-transport-security
content-security-policy
x-frame-options
x-content-type-options
referrer-policy
permissions-policy

findings

CSP allows unsafe inline scripts/styles

Header values

referrer-policy: strict-origin-when-cross-origin
x-frame-options: SAMEORIGIN
permissions-policy: geolocation=(), microphone=(), camera=()
x-content-type-options: nosniff
content-security-policy: default-src 'self'; img-src 'self' data: blob: https: https://leanpub.com; object-src 'self' blob: https://leanpub.com; script-src 'self' 'unsafe-inline' 'unsafe-eval' https: https://leanpub.com https://www.google.com/recaptcha/ https://www.gstatic.com/recaptcha/; style-src 'self' 'unsafe-inline' https: https://leanpub.com; connect-src 'self' https: https://leanpub.com https://www.google.com/recaptcha/; font-src 'self' data: https: https://leanpub.com; frame-src 'self' https: https://leanpub.com https://www.youtube.com https://www.youtube-nocookie.com https://player.vimeo.com https://www.google.com https://www.gstatic.com https://recaptcha.google.com/recaptcha/ https://www.paypal.com; media-src 'self' blob: https: https://leanpub.com s3.us-east-1.amazonaws.com; worker-src 'self' blob:; frame-ancestors 'self'; upgrade-insecure-requests
strict-transport-security: max-age=31536000; includeSubDomains; preload