Verdict
Valid & trusted
- Trusted chain
- yes
- Name matches
- yes
- Expires
- 2026-12-11 56 days
- Connection
- TLSv1.3 · TLS_AES_256_GCM_SHA384
- STARTTLS
- SMTP
- Server IP
- 192.178.156.109
SSL / TLS check
smtp.gmail.com:587
Certificate, chain, expiry and supported TLS versions. Ports 25, 587, 143 and 110 use STARTTLS automatically.
TLS versions
- TLS 1.3enabled
- TLS 1.2enabled
- TLS 1.1enabled (insecure)
- TLS 1.0enabled (insecure)
Certificate
- Subject
- smtp.gmail.com
- Issuer
- WE2 · Google Trust Services
- Valid
- 2026-09-18 – 2026-12-11
- Names
- smtp.gmail.com
- Key
- ECDSA prime256v1
- Serial
- 1702BEE8068714AC0A68A6D7576E815E
- SHA-256
- 24:D7:9B:CB:AD:E7:6C:0F:D9:39:B8:07:00:84:B9:6B:CB:5B:C2:53:F7:1E:E9:5C:44:1A:C4:8C:EF:E1:BD:67
Chain as sent by the server
- smtp.gmail.comServer certificate · issued by WE2 (Google Trust Services) · until 2026-12-11
- WE2Intermediate · issued by GTS Root R4 (Google Trust Services) · until 2029-02-20
- GTS Root R4Intermediate · issued by GlobalSign Root CA (GlobalSign) · until 2028-01-28
Same in the terminal
$ curl tools.otw.solutions/ssl/smtp.gmail.com:587Checked in 218 ms.