Smartsheet · Domain Security

Smartsheet Domain Security

Domain security

Domain security posture for Smartsheet, probed live across 3 host(s) and 1 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=reject).

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Transport & Host Security

www.smartsheet.com
HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Aug 30 18:50:19 2026 GMT
developers.smartsheet.com
HTTPS: yes · TLS: TLSv1.3 · HSTS: no · cert expires: Aug 11 11:15:38 2026 GMT
api.smartsheet.com
HTTPS: yes · TLS: TLSv1.3 · HSTS: no · cert expires: Nov 6 23:59:59 2026 GMT

Domain (DNS/Email) Security

smartsheet.com
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: www.smartsheet.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Aug 30 18:50:19 2026 GMT
  hsts: true
  hsts_max_age: 31557600
- host: developers.smartsheet.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Aug 11 11:15:38 2026 GMT
  hsts: false
- host: api.smartsheet.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Nov  6 23:59:59 2026 GMT
  hsts: null
domains:
- domain: smartsheet.com
  dnssec: false
  caa:
  - 0 issue "digicert.com"
  - 0 issue "letsencrypt.org"
  - 0 iodef "mailto:security@smartsheet.com"
  - 0 issue "amazon.com"
  spf: true
  dmarc: true
  dmarc_policy: reject