SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
proxima-mail.com
SSL/TLS Certificate
SSL/TLS Certificate for proxima-mail.com
Hostname mismatch- Issued by (CA)
- Let's Encrypt
- Subject
- box.proxima-mail.com
- Valid from
- Jul 20, 2026
- Valid until
- Oct 18, 2026 (41 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05C8C49E4ABAAFFC3D343B8A7D63D65F4756
- SHA-256 fingerprint
- 4C:5C:95:D5:58:D0:C4:71:A2:C1:64:DC:4D:7F:BC:73:CF:49:29:D4:46:A9:04:49:28:63:CD:6F:56:F0:28:7B
- 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.
This certificate has been served since Aug 17, 2026.
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This is today's certificate. Turn on monitoring and we'll watch proxima-mail.com continuously, notifying you the moment anything moves across all three signals:
Uptime
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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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