SSL/TLS Certificate Lookup

Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted

cf-mail.de

SSL/TLS Certificate

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SSL/TLS Certificate for cf-mail.de

Valid
Issued by (CA)
Let's Encrypt
Subject
mailsrv.cf-mail.de
Valid from
Jul 3, 2026
Valid until
Oct 1, 2026 (52 days remaining)
Public key
RSA 4096-bit
Serial
0528B11350746EDF57439BB74976B332DDEB
SHA-256 fingerprint
BD:BB:EB:B7:33:B4:77:B3:4E:8B:E6:BD:E9:02:76:7C:79:C4:7D:38:7D:4A:45:B2:00:B0:16:10:1A:C4:5A:1D
Chain
YR2 → Root YR → ISRG Root X1
Subject Alternative Names (20)
autoconfig.cf-mail.de, autoconfig.cfcoach.de, autoconfig.cleanbrand.de, autodiscover.cf-mail.de, autodiscover.cfcoach.de, autodiscover.cleanbrand.de, cf-mail.de, cfcoach.de, imap.cf-mail.de, imap.cfcoach.de, imap.cleanbrand.de, mail.cf-mail.de, mail.cfcoach.de, mail.cleanbrand.de, mailsrv.cf-mail.de, mailsrv.cfcoach.de, mailsrv.cleanbrand.de, smtp.cf-mail.de, smtp.cfcoach.de, smtp.cleanbrand.de

Certificate Authority Authorization (CAA)

No CAA policy is published for this domain — any certificate authority may issue for it.

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Uptime

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DNS changes

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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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