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

flowmailer.com · 185.136.67.4:443

Verified

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

Subject
CN=e-mailhub.nl
Issuer
C=US O=Let's Encrypt CN=YR1
Valid from
2026-09-05T04:41:54+00:00
Expires
2026-12-04T04:41:53+00:00
Days remaining
58
Serial (hex)
06058197F717E6EA7B11811DBC5ECF30E6BF
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:e-mailhub.nl, DNS:emailhub.nl, DNS:flowmailer.at, DNS:flowmailer.be, DNS:flowmailer.com, DNS:flowmailer.de, DNS:flowmailer.eu, DNS:flowmailer.fr, DNS:flowmailer.net, DNS:flowmailer.nl, DNS:flowmailer.org, DNS:flowmailer.uk, DNS:mail.flowmailer.com, DNS:persoonlijkautomatiseren.nl, DNS:stuurgeennepmail.nl, DNS:www.e-mailhub.nl, DNS:www.emailhub.nl, DNS:www.flowmailer.at, DNS:www.flowmailer.be, DNS:www.flowmailer.com, DNS:www.flowmailer.de, DNS:www.flowmailer.eu, DNS:www.flowmailer.fr, DNS:www.flowmailer.nl, DNS:www.flowmailer.org, DNS:www.flowmailer.uk, DNS:www.persoonlijkautomatiseren.nl, DNS:www.stuurgeennepmail.nl

SHA-256 fingerprint

62:8D:79:04:39:5B:C4:55:27:19:35:A8:C1:1A:2E:30:C8:7A:86:D6:1A:0C:2A:98:2C:23:CC:74:34:24:DF:9C
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
ED:FA:9A:FF:1E:15:A7:0C:CD:39:23:F1:50:05:74:E3:30:BF:60:C9
authorityKeyIdentifier
1F:2F:35:BE:46:14:82:CD:40:B1:AE:79:2C:55:78:FA:F7:D4:68:FB
authorityInfoAccess
CA Issuers - URI:http://yr1.i.lencr.org/
subjectAltName
DNS:e-mailhub.nl, DNS:emailhub.nl, DNS:flowmailer.at, DNS:flowmailer.be, DNS:flowmailer.com, DNS:flowmailer.de, DNS:flowmailer.eu, DNS:flowmailer.fr, DNS:flowmailer.net, DNS:flowmailer.nl, DNS:flowmailer.org, DNS:flowmailer.uk, DNS:mail.flowmailer.com, DNS:persoonlijkautomatiseren.nl, DNS:stuurgeennepmail.nl, DNS:www.e-mailhub.nl, DNS:www.emailhub.nl, DNS:www.flowmailer.at, DNS:www.flowmailer.be, DNS:www.flowmailer.com, DNS:www.flowmailer.de, DNS:www.flowmailer.eu, DNS:www.flowmailer.fr, DNS:www.flowmailer.nl, DNS:www.flowmailer.org, DNS:www.flowmailer.uk, DNS:www.persoonlijkautomatiseren.nl, DNS:www.stuurgeennepmail.nl
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr1.c.lencr.org/64.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : CB:38:F7:15:89:7C:84:A1:44:5F:5B:C1:DD:FB:C9:6E: F2:9A:59:CD:47:0A:69:05:85:B0:CB:14:C3:14:58:E7 Timestamp : Sep 5 05:40:24.542 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:42:F1:50:C1:B6:90:23:64:4F:63:58:9F: 75:F7:14:48:A1:73:16:8C:8F:32:CC:D8:B8:49:B6:FD: B4:66:88:99:02:21:00:CA:2B:43:15:C7:96:9F:ED:8F: D8:78:94:5C:B2:6C:F0:A4:E3:8D:C8:3E:82:78:18:4D: 71:74:87:85:A5:6F:57 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : A8:26:CB:E3:0A:C6:35:12:46:53:3F:E0:65:F1:4F:19: D9:6E:19:08:13:C4:1D:D9:6D:79:00:B3:12:3C:55:27 Timestamp : Sep 5 05:40:25.048 2026 GMT Extensions: 00:00:05:00:2C:63:6F:AA Signature : ecdsa-with-SHA256 30:45:02:20:56:87:12:51:32:45:F5:21:67:F6:27:D1: 0A:4D:BE:59:E1:2C:BA:25:7D:B4:B6:02:E0:AE:C4:40: F6:4F:03:69:02:21:00:AE:55:4F:A7:2E:87:08:85:99: BC:B4:E0:A2:01:9A:F2:DB:5A:5D:14:E3:97:A2:BC:8C: 88:04:6B:70:5E:2A:F9
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-06T17:34:22+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=US O=Let's Encrypt CN=YR1
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
697
Serial (hex)
A20253F15F2691C05DC1CE13B9BCCA4E
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

13:94:96:34:D9:9C:D6:FD:6A:A8:0B:C0:34:FE:FA:CC:EB:19:69:FE:EF:98:65:86:71:3E:CD:BB:05:75:8D:3F
Certificate extensions & PEM
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:TRUE, pathlen:0
subjectKeyIdentifier
1F:2F:35:BE:46:14:82:CD:40:B1:AE:79:2C:55:78:FA:F7:D4:68:FB
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
2158
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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