SSL-Tools

SSL check results of zeitspuren.ch

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Discover if the mail servers for zeitspuren.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

JSON Refresh

Report created Sun, 17 May 2026 17:01:16 +0000

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

Servers

Incoming Mails

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

Hostname / IP address Priority STARTTLS Certificates Protocol
mail.zeitspuren.ch
5.9.147.5
 5
supported
shelltec.de
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
1 s

Outgoing Mails

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

Certificates

First seen at:

CN=shelltec.de

Certificate chain
  • shelltec.de
    • remaining
    • 2048 bit
    • sha256WithRSAEncryption
      • R13
        • remaining
        • 2048 bit
        • sha256WithRSAEncryption
          • ISRG Root X1 (Certificate is self-signed.)
            • remaining
            • 4096 bit
            • sha256WithRSAEncryption
Subject
Common Name (CN)
  • shelltec.de
Alternative Names
  • autoconfig.shelltec.de
  • autodiscover.shelltec.de
  • mail.nachtblut.de
  • mail.shelltec.de
  • mail.zeitspuren.ch
  • serenity.shelltec.de
  • shelltec.de
  • www.shelltec.de
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • R13
validity period
Not valid before
2026-05-17
Not valid after
2026-08-15
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
Fingerprints
SHA256
8C:8E:4B:B6:AF:97:14:E0:74:E5:88:6C:A3:3C:A4:BE:1B:EE:67:81:0D:02:BF:18:56:DE:2C:B3:C6:7B:B9:E5
SHA1
38:60:DC:6C:3E:C7:C2:CE:FE:F3:28:D7:A3:F9:C2:CA:0F:84:F0:07
X509v3 extensions
subjectKeyIdentifier
  • 5C:1B:8D:57:52:5E:99:F4:11:49:4E:62:80:3E:73:9A:8A:A7:DA:87
authorityKeyIdentifier
  • keyid:E7:AB:9F:0F:2C:33:A0:53:D3:5E:4F:78:C8:B2:84:0E:3B:D6:92:33
authorityInfoAccess
  • CA Issuers - URI:http://r13.i.lencr.org/
certificatePolicies
  • Policy: 2.23.140.1.2.1
crlDistributionPoints
  • Full Name:
  • URI:http://r13.c.lencr.org/52.crl
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : D8:09:55:3B:94:4F:7A:FF:C8:16:19:6F:94:4F:85:AB:
  • B0:F8:FC:5E:87:55:26:0F:15:D1:2E:72:BB:45:4B:14
  • Timestamp : May 17 16:53:44.313 2026 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:44:02:20:52:1F:CB:9B:F3:10:EE:64:0F:F1:B9:FE:
  • 09:20:BF:6B:4E:39:7C:2C:20:02:EC:62:81:53:FC:9C:
  • 27:3F:2F:34:02:20:20:7A:65:EF:42:59:E7:87:57:D4:
  • E1:71:E8:5D:A4:39:57:30:B1:CC:C9:24:01:74:98:BD:
  • 1E:F7:0A:28:E1:1C
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 1A:8B:9D:6B:0F:FE:BF:81:B4:79:39:C6:D2:31:0A:86:
  • D6:D1:02:D4:F0:46:E2:18:2C:9D:E3:5F:5E:26:25:EF
  • Timestamp : May 17 16:53:44.700 2026 GMT
  • Extensions: 00:00:05:00:13:CC:E2:63
  • Signature : ecdsa-with-SHA256
  • 30:45:02:20:6C:14:A4:75:53:98:58:BF:EE:F2:CF:08:
  • 1D:66:39:2E:57:49:1C:30:C8:CB:DB:B8:CB:74:74:AA:
  • 5B:19:C4:80:02:21:00:D8:46:85:A8:BE:48:74:C1:2B:
  • C8:E7:BD:2C:83:F4:CF:9C:79:72:7C:0E:A6:3A:92:8C:
  • 63:8C:6D:D4:E6:0B:01