Submittable · Domain Security

Submittable Domain Security

Domain security

Domain security posture for Submittable, probed live across 3 host(s) and 2 registrable domain(s). 3 host(s) serve HTTPS (up to TLSv1.3); 1 advertise HSTS. Email/DNS controls: DNSSEC absent, SPF present, DMARC present (p=quarantine).

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Transport & Host Security

www.submittable.com
HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Sep 21 20:02:28 2026 GMT
submittable-api.submittable.com
HTTPS: yes · TLS: TLSv1.2 · HSTS: no · cert expires: Jan 29 23:59:59 2027 GMT
submittable.help
HTTPS: yes · TLS: TLSv1.3 · HSTS: no · cert expires: Oct 10 23:59:59 2026 GMT

Domain (DNS/Email) Security

submittable.com
DNSSEC: no · SPF: yes · DMARC: yes (p=quarantine) · CAA: none
submittable.help
DNSSEC: no · SPF: no · DMARC: no · CAA: none

Source

Domain Security

Raw ↑ 
generated: '2026-07-11'
method: probed
source: live DNS/TLS/HTTP probes of apis.yml + OpenAPI hosts
hosts:
- host: www.submittable.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Sep 21 20:02:28 2026 GMT
  hsts: true
  hsts_max_age: 31536000
- host: submittable-api.submittable.com
  https: true
  tls_version: TLSv1.2
  cert_expires: Jan 29 23:59:59 2027 GMT
  hsts: null
- host: submittable.help
  https: true
  tls_version: TLSv1.3
  cert_expires: Oct 10 23:59:59 2026 GMT
  hsts: false
domains:
- domain: submittable.com
  dnssec: false
  caa: []
  spf: true
  dmarc: true
  dmarc_policy: quarantine
- domain: submittable.help
  dnssec: false
  caa: []
  spf: false
  dmarc: false