SSL-Tools

SSL check results of kellerbasel.ch

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Discover if the mail servers for kellerbasel.ch can be reached through a secure connection.

To establish a secure connection a mail server has to offer STARTTLS (SSL), a trustworthy SSL certificate, support for the Diffie-Hellman-Algorithm to guarantee Perfect Forward Secrecy and must not be vulnerable against the Heartbleed attack. Futhermore we recommend using end-to-end encryption with GnuPG.

Summary

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Report created Sat, 10 May 2025 14:11:35 +0000

The mailservers of kellerbasel.ch can be reached through a secure connection.

Servers

Incoming Mails

These servers are responsible for incoming mails to @kellerbasel.ch addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
mail3.kellerswissgroup.com
146.4.118.18
 10
supported
mail3.kellerswissgroup.com
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
2 s

Outgoing Mails

We have not received any emails from a @kellerbasel.ch address so far. Test mail delivery

Certificates

First seen at:

CN=mail3.kellerswissgroup.com

Certificate chain
  • mail3.kellerswissgroup.com
    • remaining
    • 4096 bit
    • sha256WithRSAEncryption
      • R11
        • remaining
        • 2048 bit
        • sha256WithRSAEncryption
          • ISRG Root X1 (Certificate is self-signed.)
            • remaining
            • 4096 bit
            • sha256WithRSAEncryption
Subject
Common Name (CN)
  • mail3.kellerswissgroup.com
Alternative Names
  • mail3.kellerswissgroup.com
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • R11
validity period
Not valid before
2025-03-28
Not valid after
2025-06-26
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
EF:5F:3E:24:3C:0E:84:C6:2E:6E:D8:BF:13:AB:19:12:B5:EB:D2:0A:4A:D7:5D:EA:35:CF:36:C9:9B:63:FE:5B
SHA1
8E:DD:60:2E:C9:D4:7C:F1:8F:FF:7E:85:36:81:6A:D2:D7:22:37:94
X509v3 extensions
subjectKeyIdentifier
  • 98:8D:BC:83:79:FA:4A:62:CA:5C:96:6A:39:73:A7:CD:8D:19:40:46
authorityKeyIdentifier
  • keyid:C5:CF:46:A4:EA:F4:C3:C0:7A:6C:95:C4:2D:B0:5E:92:2F:26:E3:B9
authorityInfoAccess
  • OCSP - URI:http://r11.o.lencr.org
  • CA Issuers - URI:http://r11.i.lencr.org/
certificatePolicies
  • Policy: 2.23.140.1.2.1
crlDistributionPoints
  • Full Name:
  • URI:http://r11.c.lencr.org/5.crl
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 7D:59:1E:12:E1:78:2A:7B:1C:61:67:7C:5E:FD:F8:D0:
  • 87:5C:14:A0:4E:95:9E:B9:03:2F:D9:0E:8C:2E:79:B8
  • Timestamp : Mar 29 00:58:16.021 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:98:98:D2:97:87:14:D6:BD:7B:80:67:
  • C7:5E:05:FA:D2:F5:31:36:EB:88:04:A2:5F:F9:8C:C0:
  • 60:37:E2:0E:BF:02:21:00:AC:F4:61:B7:D4:F6:68:B0:
  • FC:00:5B:17:D9:E0:DA:B7:5C:98:87:FA:AD:84:D2:41:
  • 1D:0E:88:3A:CD:FD:71:31
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 13:4A:DF:1A:B5:98:42:09:78:0C:6F:EF:4C:7A:91:A4:
  • 16:B7:23:49:CE:58:57:6A:DF:AE:DA:A7:C2:AB:E0:22
  • Timestamp : Mar 29 00:58:16.156 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:20:60:CB:91:08:E4:7B:82:DB:17:CC:3F:90:
  • 91:36:B7:5B:9D:81:3D:DA:D7:8B:6B:32:AC:9E:44:95:
  • 1B:C4:8A:42:02:21:00:84:97:37:10:38:60:87:E2:54:
  • 4F:BC:99:63:93:92:FD:37:FB:BD:7A:2B:AB:2A:E6:FD:
  • 09:D3:16:BF:EE:8C:29