SSL check results of crayfish-marks.de

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Discover if the mail servers for crayfish-marks.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

Report created Mon, 13 Nov 2023 16:07:52 +0000

No connection to the mailservers of crayfish-marks.de could be established.

Servers

Incoming Mails

These servers are responsible for incoming mails to @crayfish-marks.de addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
postal.bytecity.eu
173.212.193.33
Results incomplete
10
supported
postal.bytecity.eu
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
1 s

Outgoing Mails

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

Certificates

First seen at:

CN=postal.bytecity.eu

Certificate chain
  • postal.bytecity.eu
    • remaining
    • 256 bit
    • sha256WithRSAEncryption

      • R3
        • remaining
        • 2048 bit
        • sha256WithRSAEncryption

          • ISRG Root X1 (Certificate is self-signed.)
            • remaining
            • 4096 bit
            • sha256WithRSAEncryption

Subject
Common Name (CN)
  • postal.bytecity.eu
Alternative Names
  • postal.bytecity.eu
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • R3
validity period
Not valid before
2023-11-04
Not valid after
2024-02-02
This certifcate has been verified for the following usages:
  • Digital Signature
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
7A:DF:5C:FF:72:EE:A2:B9:DB:2A:01:D6:64:5F:4F:97:24:63:9D:1F:17:9E:ED:5F:37:80:1E:3A:6B:D0:8E:C0
SHA1
F3:75:8E:D5:DE:D7:14:76:C3:6A:1D:AF:80:1C:B8:BB:7A:38:E9:63
X509v3 extensions
subjectKeyIdentifier
  • 40:E8:1E:57:49:3F:20:57:9B:21:00:63:6A:E1:A8:47:36:2D:E7:13
authorityKeyIdentifier
  • keyid:14:2E:B3:17:B7:58:56:CB:AE:50:09:40:E6:1F:AF:9D:8B:14:C2:C6
authorityInfoAccess
  • OCSP - URI:http://r3.o.lencr.org
  • CA Issuers - URI:http://r3.i.lencr.org/
certificatePolicies
  • Policy: 2.23.140.1.2.1
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 48:B0:E3:6B:DA:A6:47:34:0F:E5:6A:02:FA:9D:30:EB:
  • 1C:52:01:CB:56:DD:2C:81:D9:BB:BF:AB:39:D8:84:73
  • Timestamp : Nov 4 11:04:08.598 2023 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:44:02:20:24:77:3C:80:A3:5E:39:90:FC:6F:FF:17:
  • 6A:E1:DE:A7:BD:4D:9E:45:8B:45:77:DA:3B:BA:2E:A4:
  • 56:D1:CA:D7:02:20:1B:D5:96:A3:5B:F8:85:5A:40:5B:
  • CD:8D:97:56:45:34:C7:21:52:7D:20:B2:29:C4:3E:D9:
  • 4D:1E:B4:50:58:35
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 3B:53:77:75:3E:2D:B9:80:4E:8B:30:5B:06:FE:40:3B:
  • 67:D8:4F:C3:F4:C7:BD:00:0D:2D:72:6F:E1:FA:D4:17
  • Timestamp : Nov 4 11:04:08.597 2023 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:44:02:20:19:B4:E5:9D:D5:28:B2:A3:3D:D2:79:32:
  • 6B:E4:64:36:05:2F:49:36:76:0C:23:7B:38:C8:A0:08:
  • E0:60:9A:E2:02:20:4C:5B:E6:71:38:3A:A7:BF:1A:00:
  • D9:93:90:7E:41:61:57:85:66:5D:5D:1B:75:DE:C3:2E:
  • 16:26:16:68:6C:C8