SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
s-mail.ch
SSL/TLS Certificate
SSL/TLS Certificate for s-mail.ch
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- s-mail.ch
- Valid from
- Oct 25, 2026
- Valid until
- Jan 23, 2027 (81 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0608BCDA6D58D577EDF6E171E77762D7D1CF
- SHA-256 fingerprint
- A4:AC:D1:CC:7A:C2:5F:A7:78:2D:80:DA:B0:CD:27:69:A7:F0:F1:1A:8F:D8:3B:36:D3:57:5F:1B:B7:7B:A2:49
- Chain
- YR1 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by s-mail.ch's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch s-mail.ch continuously, notifying you the moment anything moves across all three signals:
Uptime
We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.
DNS changes
We watch NS, MX, CAA, CNAME, TXT and A/AAAA records, and identify the host, network, and ASN behind them, so a real migration or hijack stands out from routine noise.
TLS certificate
We warn you 30, 14, 7, and 1 days before it expires, and flag it if the issuing authority changes or the certificate is unexpectedly replaced.
Free for your first domain: uptime, DNS, and certificate together. No credit card.