DOMAINS CHANGES SERVICES CERTS API

buttondown.email

Observed 2026-06-13T12:04:54.353Z (33m ago). Every field below was attested with an Ed25519 signature at scan time.

Don't trust this page — check the math. Verification runs entirely in your browser. Nothing leaves your machine.

Verify this receipt

Ed25519 Receipt

Receipt ID
8b679012-1439-4f38-ae05-9fdbf2d000c7
Output Hash
ca4b381c01e59d8b07e0915a9f158126a9a9c1ea729368653c0a8387f7f8533c
Signature
ed25519:ff80e1d11532150b8ef2253749e3f40004a4b60bf8e0925b97066102d5e413db5bfd7264d492181e046049e302275649f5c527f3b10ed93b99be221bbd30540c
Public Key
ed25519:d3f6015a95abdad7e8166ad80938a5885500170bb75f8cdb425b8fd2772bec29
Parent
(genesis)
Plane
fast
Verify this in your browser

DNS Records

A 4

  • 75.101.184.39
  • 54.209.91.188
  • 54.204.238.15
  • 54.221.251.148

MX 5

  • {"priority":1,"exchange":"aspmx.l.google.com"}
  • {"priority":10,"exchange":"alt3.aspmx.l.google.com"}
  • {"priority":10,"exchange":"alt4.aspmx.l.google.com"}
  • {"priority":5,"exchange":"alt1.aspmx.l.google.com"}
  • {"priority":5,"exchange":"alt2.aspmx.l.google.com"}

TXT 8

  • 1password-site-verification=SQFNCPTWYJFUZGBQTZBBBQT7YI
  • ALIAS for polar-river-hggprmzkna9p4dkhgk3jhfxw.herokudns.com
  • google-site-verification=Dmi0GffqXwrRbWgcif8u9EJvtBWhMMfRpvBXB13nmxg
  • google-site-verification=k-46SCelqDM-DYP7-riK-rNWNak9ep4M4-iabUrxr9g
  • v=spf1 include:mailgun.org include:_spf.google.com include:spf.01.smtp.email-infrastructure.com include:spf.02.smtp.email-infrastructure.com include:spf.03.smtp.email-infrastructure.com ~all
  • yahoo-verification-key=+2xXdyy7PO1udmxZHJNvAMCBOwbGtTPnYHsdsU6LuUY=
  • yahoo-verification-key=k0v5slP3g0A6rJfJnyMCdKHj2DHYAsJfhpLc1D1qCRM=
  • v=DMARC1; p=none; rua=mailto:dmarc.y8rijlj3ojbbqjpggdoj@mail.suped.com,mailto:postmaster@buttondown.com; fo=1

NS 2

  • apollo.ns.cloudflare.com
  • ivy.ns.cloudflare.com

SOA 1

  • {"mname":"apollo.ns.cloudflare.com","rname":"dns.cloudflare.com","serial":2406693990,"refresh":10000,"retry":2400,"expire":604800,"minimum":1800}

TLS Certificates (2)

Common NameIssuerExpires
buttondown.email C=US, O=Let's Encrypt, CN=R13 Thu, 13 Aug 2026 00:46:45 +0000
R13 C=US, O=Internet Security Research Group, CN=ISRG Root X1 Fri, 12 Mar 2027 23:59:59 +0000

Subdomains (0)

None observed.