SendGrid · Domain Security

Sendgrid Domain Security

Domain security

Domain security posture for SendGrid, probed live across 3 host(s) and 2 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).

EmailEmail APIMarketing EmailSMTPT1Transactional Email

Transport & Host Security

app.sendgrid.com
HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Oct 16 23:59:59 2026 GMT
sendgrid.com
HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Feb 28 17:29:00 2027 GMT
www.twilio.com
HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Mar 13 23:59:59 2027 GMT

Domain (DNS/Email) Security

sendgrid.com
DNSSEC: no · SPF: yes · DMARC: yes (p=reject) · CAA: yes
twilio.com
DNSSEC: no · SPF: yes · DMARC: yes (p=reject) · 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: app.sendgrid.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Oct 16 23:59:59 2026 GMT
  hsts: true
  hsts_max_age: 63072000
- host: sendgrid.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Feb 28 17:29:00 2027 GMT
  hsts: true
  hsts_max_age: 31557600
- host: www.twilio.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Mar 13 23:59:59 2027 GMT
  hsts: true
  hsts_max_age: 31557600
domains:
- domain: sendgrid.com
  dnssec: false
  caa:
  - 0 issue "symantec.com"
  - 0 issue "globalsign.com"
  - 0 issue "amazon.com"
  - 0 issue "godaddy.com"
  - 0 issue "sectigo.com"
  - 0 issue "letsencrypt.org"
  spf: true
  dmarc: true
  dmarc_policy: reject
- domain: twilio.com
  dnssec: false
  caa: []
  spf: true
  dmarc: true
  dmarc_policy: reject