DNS
THE CERTIFICATE BEHIND THE CONNECTION

TLS certificate checker.

Inspect SSL/TLS certificates for any public domain or subdomain.

Checks HTTPS on port 443, including subject alternative names, validity dates and the presented chain.

SSL certificate

TLSv1.3

bratschi-ch.gate.seppmail.cloud · 86.119.35.35:443

Verified

Certificate chain, hostname and dates verified using this server’s CA store.

Subject
CN=ch.seppmail.cloud
Issuer
C=US O=Let's Encrypt CN=YR2
Valid from
2026-09-30T01:01:03+00:00
Expires
2026-12-29T01:01:02+00:00
Days remaining
86
Serial (hex)
063E4992ADEB470046766C0D7B7240AFFAF6
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:*.ch.seppmail.cloud, DNS:*.gate.seppmail.cloud, DNS:*.mail.seppmail.cloud, DNS:*.relay.seppmail.cloud, DNS:ch.seppmail.cloud, DNS:gate.seppmail.cloud, DNS:mail.seppmail.cloud, DNS:relay.seppmail.cloud

SHA-256 fingerprint

B8:07:99:86:77:1F:2E:36:E5:C8:65:7F:5D:3E:2F:7E:9B:F3:E6:5C:8E:07:EB:17:5D:2D:24:00:A7:C1:0D:D5
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
39:E0:7B:C4:36:45:E9:F0:8B:A7:78:81:70:CE:22:EC:8A:C8:36:AF
authorityKeyIdentifier
40:15:2D:26:79:ED:32:20:9E:DF:9A:72:1D:D6:32:1F:81:0C:81:0C
authorityInfoAccess
CA Issuers - URI:http://yr2.i.lencr.org/
subjectAltName
DNS:*.ch.seppmail.cloud, DNS:*.gate.seppmail.cloud, DNS:*.mail.seppmail.cloud, DNS:*.relay.seppmail.cloud, DNS:ch.seppmail.cloud, DNS:gate.seppmail.cloud, DNS:mail.seppmail.cloud, DNS:relay.seppmail.cloud
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr2.c.lencr.org/119.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 94:4E:43:87:FA:EC:C1:EF:81:F3:19:24:26:A8:18:65: 01:C7:D3:5F:38:02:01:3F:72:67:7D:55:37:2E:19:D8 Timestamp : Sep 30 01:59:33.853 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:35:C1:64:46:51:8B:99:C2:84:38:30:A3: E1:0D:2D:EF:0D:44:E6:03:A4:C7:95:03:65:62:5B:05: 56:6C:34:6E:02:20:78:2C:B9:A8:40:B8:4B:74:7C:C2: 1B:A7:16:E5:B0:CC:94:25:64:B8:B8:68:89:32:E3:23: D5:4A:37:E3:39:EC Signed Certificate Timestamp: Version : v1 (0x0) Log ID : A2:81:00:18:73:4E:17:6E:1D:47:E0:95:40:F3:81:BA: 54:66:97:CD:63:A8:43:50:71:6E:B8:09:4E:DA:F1:0D Timestamp : Sep 30 01:59:34.653 2026 GMT Extensions: 00:00:05:00:18:62:6A:6D Signature : ecdsa-with-SHA256 30:45:02:21:00:C4:60:9A:08:CB:81:F6:2D:3F:DE:F5: A8:2B:33:63:BA:68:3C:EC:B9:DF:97:C2:DA:FD:1B:0C: 9B:5B:77:5B:FB:02:20:75:BE:89:56:A7:D5:C6:88:64: D4:47:03:F1:D9:8C:01:B7:F1:CB:1E:2B:48:16:A7:76: D1:2C:E5:43:52:25:80
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_CHACHA20_POLY1305_SHA256 · Checked 2026-10-03T03:44:15+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=US O=Let's Encrypt CN=YR2
Issuer
C=US O=ISRG CN=Root YR
Valid from
2025-09-03T00:00:00+00:00
Expires
2028-09-02T23:59:59+00:00
Days remaining
700
Serial (hex)
4EBD24947E24D394802D84A52FD5B319
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

23:8B:85:A0:09:9C:65:B9:70:47:7D:57:24:F1:A1:D4:75:CE:50:58:CF:FE:4E:FA:87:33:89:9B:DB:86:3C:47
Certificate extensions & PEM
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:TRUE, pathlen:0
subjectKeyIdentifier
40:15:2D:26:79:ED:32:20:9E:DF:9A:72:1D:D6:32:1F:81:0C:81:0C
authorityKeyIdentifier
DE:E7:5B:60:D0:22:6D:40:28:7D:3F:0D:01:FE:A4:B5:52:B4:51:94
authorityInfoAccess
CA Issuers - URI:http://yr.i.lencr.org/
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr.c.lencr.org/ 
-----BEGIN CERTIFICATE-----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==
-----END CERTIFICATE-----

Chain certificate 2

Subject
C=US O=ISRG CN=Root YR
Issuer
C=US O=Internet Security Research Group CN=ISRG Root X1
Valid from
2026-05-13T00:00:00+00:00
Expires
2032-09-02T23:59:59+00:00
Days remaining
2161
Serial (hex)
F24B6D17F9D9AD7CB1C9FEA78782699F
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

07:26:39:D0:B1:40:D5:BF:FA:E1:6A:D9:C3:F6:CC:60:86:04:06:21:F5:1E:E6:1A:6D:46:A8:91:5C:07:CF:76
Certificate extensions & PEM
keyUsage
Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:TRUE
subjectKeyIdentifier
DE:E7:5B:60:D0:22:6D:40:28:7D:3F:0D:01:FE:A4:B5:52:B4:51:94
authorityKeyIdentifier
79:B4:59:E6:7B:B6:E5:E4:01:73:80:08:88:C8:1A:58:F6:E9:9B:6E
authorityInfoAccess
CA Issuers - URI:http://x1.i.lencr.org/
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://x1.c.lencr.org/ 
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

One endpoint on port 443. Server-presented chain; no revocation, OCSP, CT or full TLS security scan.

View certificate JSON

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