SSL-Tools

SSL check results of rzhartmann.de

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Discover if the mail servers for rzhartmann.de 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 Tue, 09 Sep 2025 14:39:16 +0000

The mailservers of rzhartmann.de can be reached through a secure connection.

Servers

Incoming Mails

These servers are responsible for incoming mails to @rzhartmann.de addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
mx02.rzh-nds.de
62.159.141.156
 10
supported
rzh-nds.de
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
2 s

Outgoing Mails

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

Certificates

First seen at:

CN=rzh-nds.de

Certificate chain
  • rzh-nds.de
    • remaining
    • 4096 bit
    • sha256WithRSAEncryption
      • R11
        • remaining
        • 2048 bit
        • sha256WithRSAEncryption
          • ISRG Root X1 (Certificate is self-signed.)
            • remaining
            • 4096 bit
            • sha256WithRSAEncryption
Subject
Common Name (CN)
  • rzh-nds.de
Alternative Names
  • mx02.rzh-nds.de
  • quark.rzh-nds.de
  • rzh-nds.de
  • www.rzh-nds.de
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • R11
validity period
Not valid before
2025-07-05
Not valid after
2025-10-03
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
B8:39:80:BA:C4:68:C6:C7:AF:FE:C1:40:66:F3:57:F6:D7:9B:E8:68:D8:FE:81:9F:30:74:E9:C5:8A:3F:97:72
SHA1
F8:BF:9C:C6:CE:61:84:D6:A7:60:43:9E:70:D1:3E:F9:6B:11:4B:37
X509v3 extensions
subjectKeyIdentifier
  • 91:A4:1A:1D:08:FA:10:0D:AE:47:37:7E:F5:FF:6E:03:92:8A:A5:D9
authorityKeyIdentifier
  • keyid:C5:CF:46:A4:EA:F4:C3:C0:7A:6C:95:C4:2D:B0:5E:92:2F:26:E3:B9
authorityInfoAccess
  • 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/9.crl
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : ED:3C:4B:D6:E8:06:C2:A4:A2:00:57:DB:CB:24:E2:38:
  • 01:DF:51:2F:ED:C4:86:C5:70:0F:20:DD:B7:3E:3F:E0
  • Timestamp : Jul 5 23:00:57.910 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:DC:21:29:35:C9:28:61:6F:E2:4C:97:
  • 7C:41:2A:68:02:75:4B:48:83:97:80:09:8F:E5:7C:49:
  • BB:4B:FA:E2:33:02:20:3B:1E:C7:23:C9:66:8C:EB:91:
  • D3:3E:74:77:38:89:D5:45:91:37:E6:91:CB:82:40:A3:
  • 27:7E:41:65:59:DD:35
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 12:F1:4E:34:BD:53:72:4C:84:06:19:C3:8F:3F:7A:13:
  • F8:E7:B5:62:87:88:9C:6D:30:05:84:EB:E5:86:26:3A
  • Timestamp : Jul 5 23:01:01.907 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:FE:0A:DF:85:10:BE:D1:E8:68:69:FF:
  • 82:6F:72:F2:A1:E2:C3:62:4B:42:9B:00:25:DD:19:CE:
  • A5:19:B3:CB:31:02:20:09:62:14:9F:00:E8:32:C1:19:
  • 90:F6:EB:BF:D5:C7:02:CD:AF:93:B5:97:AE:55:CC:92:
  • 68:75:63:C6:E8:93:A6