SMTP TLS Posture Check for gmail.com
TLS configuration looks healthy.Healthy: STARTTLS supported, TLS 1.2+, valid certificate, MTA-STS enforce or testing mode. Learn more →
TLS configuration looks healthy.
Computed 19 seconds ago
Outbound submission TLS posture
TLS configuration looks healthy.
via SRV `_submission._tcp.gmail.com`
Submission (port 587 / STARTTLS)
TLS configuration looks healthy.
- TLS version
- TLSv1.3
- Cipher
- TLS_AES_256_GCM_SHA384The cipher suite is the algorithm pair used for key exchange and data encryption in a TLS session. Learn more →
Certificate
- Subject
- CN=smtp.gmail.com
- SAN
- smtp.gmail.com
- Issuer
- CN=WE2,O=Google Trust Services,C=US
- Valid from
- 2026-05-07T15:53:19.000Z
- Valid to
- 2026-07-30T15:53:18.000Z
- Expires in
- 67 days
- Fingerprint
- 5B:50:86:9C:6B:CF:E0:BB…
Untrusted CA chain
SMTPS (port 465 / Implicit TLS)
TLS configuration looks healthy.
- TLS version
- TLSv1.3
- Cipher
- TLS_AES_256_GCM_SHA384The cipher suite is the algorithm pair used for key exchange and data encryption in a TLS session. Learn more →
Certificate
- Subject
- CN=smtp.gmail.com
- SAN
- smtp.gmail.com
- Issuer
- CN=WE2,O=Google Trust Services,C=US
- Valid from
- 2026-05-07T15:53:19.000Z
- Valid to
- 2026-07-30T15:53:18.000Z
- Expires in
- 67 days
- Fingerprint
- 5B:50:86:9C:6B:CF:E0:BB…
Untrusted CA chain
Inbound MX TLS posture (announced)
TLS configuration looks healthy.
MTA-STS policy
MTA-STS: enforceMX patterns
- smtp.google.com
- gmail-smtp-in.l.google.com
- *.gmail-smtp-in.l.google.com
- Max age
- 1 days
- Policy ID
- 20190429T010101
TLS-RPT (reporting)
TLS-RPT published
- ✉sts-reports@google.com