SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
j-mail.ch
SSL/TLS Certificate
SSL/TLS Certificate for j-mail.ch
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- *.j-mail.ch
- Valid from
- Aug 16, 2026
- Valid until
- Nov 14, 2026 (44 days remaining)
- Public key
- EC 256-bit
- Serial
- 05EE3E6096CE48A80A67A6C0906639D35EBB
- SHA-256 fingerprint
- AB:73:F2:73:6E:0F:25:7C:09:A5:65:3C:75:77:08:17:B3:6C:20:06:11:4C:70:8C:69:49:48:F9:E6:4C:71:60
- Chain
- YE1 → Root YE → ISRG Root X2 → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
This certificate has been served since Sep 14, 2026.
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This is today's certificate. Turn on monitoring and we'll watch j-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, DNSSEC, CNAME 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.
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