Let's Encrypt · Domain Security

Lets Encrypt Domain Security

Domain security

Domain security posture for Let’s Encrypt, probed live across 3 host(s) and 1 registrable domain(s). 3 host(s) serve HTTPS (up to TLSv1.3); 3 advertise HSTS. Email/DNS controls: DNSSEC absent, SPF present, DMARC present (p=reject).

CertificatesLinux FoundationSecurityTLSACMEPKI

Transport & Host Security

letsencrypt.org
HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Oct 4 15:24:33 2026 GMT
acme-v02.api.letsencrypt.org
HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Aug 28 23:05:30 2026 GMT
acme-staging-v02.api.letsencrypt.org
HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Aug 28 21:57:59 2026 GMT

Domain (DNS/Email) Security

letsencrypt.org
DNSSEC: no · SPF: yes · DMARC: yes (p=reject) · CAA: yes

Source

Domain Security

Raw ↑ 
generated: '2026-07-11'
method: probed
source: live DNS/TLS/HTTP probes of apis.yml + OpenAPI hosts
hosts:
- host: letsencrypt.org
  https: true
  tls_version: TLSv1.3
  cert_expires: Oct  4 15:24:33 2026 GMT
  hsts: true
  hsts_max_age: 31536000
- host: acme-v02.api.letsencrypt.org
  https: true
  tls_version: TLSv1.3
  cert_expires: Aug 28 23:05:30 2026 GMT
  hsts: true
  hsts_max_age: 604800
- host: acme-staging-v02.api.letsencrypt.org
  https: true
  tls_version: TLSv1.3
  cert_expires: Aug 28 21:57:59 2026 GMT
  hsts: true
  hsts_max_age: 604800
domains:
- domain: letsencrypt.org
  dnssec: false
  caa:
  - 0 issue "pki.goog"
  - 0 issue "sectigo.com"
  - 0 issue "ssl.com"
  - 0 issue "www.digicert.com"
  - 0 issuewild "amazon.com"
  - 0 issuewild "letsencrypt.org"
  spf: true
  dmarc: true
  dmarc_policy: reject