SSL-Tools

SSL check results of lists.cluenet.de

NEW You can also bulk check multiple servers.

Discover if the mail servers for lists.cluenet.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 Wed, 27 May 2020 00:37:58 +0000

The mailservers of lists.cluenet.de can be reached through an encrypted connection.

However, we found problems that may affect the security.

Servers

Incoming Mails

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

Hostname / IP address Priority STARTTLS Certificates Protocol
mail1.cluenet.de
2001:1440:201:101::5
 10
supported
mail1.cluenet.de
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.0
  • SSLv3
2 s
mail1.cluenet.de
195.20.121.100
 10
supported
mail1.cluenet.de
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.0
  • SSLv3
2 s

Outgoing Mails

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

Certificates

First seen at:

emailAddress=noc@cluenet.de,CN=mail1.cluenet.de,O=The ClueNet Project,L=Cologne,C=DE

Certificate chain
  • mail1.cluenet.de (Certificate is self-signed.)
    • remaining
    • 4096 bit
    • sha256WithRSAEncryption
    • Unknown Authority
Subject
Country (C)
  • DE
Locality (L)
  • Cologne
Organization (O)
  • The ClueNet Project
Common Name (CN)
  • mail1.cluenet.de
Email
  • noc@cluenet.de
Issuer

Certificate is self-signed.

validity period
Not valid before
2020-03-07
Not valid after
2030-03-05
Fingerprints
SHA256
95:A7:72:07:94:63:DB:12:AD:1D:73:BD:C7:EA:30:20:31:E2:2F:6E:C8:64:EA:60:50:90:AE:C7:A7:DD:0A:E8
SHA1
E2:C8:C7:F3:4F:76:B5:B6:44:0C:B9:38:7F:EB:0C:81:A1:11:45:78
X509v3 extensions
subjectKeyIdentifier
  • 79:3D:94:09:FD:D2:B3:5F:14:61:DB:AD:04:B6:FA:DA:BD:DF:CB:1A
authorityKeyIdentifier
  • keyid:79:3D:94:09:FD:D2:B3:5F:14:61:DB:AD:04:B6:FA:DA:BD:DF:CB:1A