buttondown.com

.com crawl

First seen 2026-04-11 · Last seen 2026-05-18 · ok HTTP/1.1 200 871 ms crawled 2026-05-18

US · 13.248.213.92 · AS16509 Amazon.com, Inc.

Reputation 100/100

Classifying

HTML metadata

Title: Buttondown — Newsletter software for people like you
Description: Buttondown is the last email platform you'll migrate to. We're focused on your success, not on bleeding you dry.
Language: en

Open Graph

url: https://buttondown.com
title: Buttondown — Newsletter software for people like you
locale: en_US
site name: Buttondown
description: Buttondown is the last email platform you'll migrate to. We're focused on your success, not on bleeding you dry.

Technology

CDN: Vercel
Server: Heroku
CMS: Next.js

Third-party hosts loaded (1)

cdn.seline.com×1

Social

Contact

Email

support@buttondown.com

Registration

Registrar

Cloudflare, Inc.

Created

2004-07-09

Expires

2027-07-09 416 days left

Updated

2026-02-06

Name servers

joan.ns.cloudflare.com
moura.ns.cloudflare.com

DNS records live

NS

joan.ns.cloudflare.com
moura.ns.cloudflare.com

MX

19 route3.mx.cloudflare.net
65 route1.mx.cloudflare.net
90 route2.mx.cloudflare.net

TXT

google-site-verification=2kAEIWWb-UQgwnEtpH9w3Ij1Fs_poH7SjjTyQqoGX14
1password-site-verification=EQ3GSAPOMJFDPOWBC4AVB5JSUI

Email authentication strong

SPF: v=spf1 include:_spf.mx.cloudflare.net ~all
softfail (~all)
DMARC: v=DMARC1; p=quarantine; rua=mailto:25e9278b3c09055e635e214501d37d9d@inbound.postmarkapp.com; aspf=r; pct=100;
policy: quarantine
DKIM: no key found at common selectors

Certificate (current)

R13

from 2026-03-29 to 2026-06-27

Expires in 39 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 50/100 Checked live page: https://buttondown.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=63072000