SSL check results of stressuns.net

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Discover if the mail servers for stressuns.net 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, 25 May 2020 12:10:27 +0000

The mailservers of stressuns.net 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 @stressuns.net addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
mail.kernelpicnic.de
2a03:4000:2:810::243
25
supported
mail.kernelpicnic.de
DANE
valid
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
6 s
mail.kernelpicnic.de
46.38.232.243
25
supported
mail.kernelpicnic.de
DANE
valid
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
6 s

Outgoing Mails

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

Certificates

First seen at:

CN=mail.kernelpicnic.de

Certificate chain
Subject
Common Name (CN)
  • mail.kernelpicnic.de
Alternative Names
  • autoconfig.familie-schulz.email
  • autoconfig.stressuns.net
  • autodiscover.familie-schulz.email
  • autodiscover.stressuns.net
  • icinga.kernelpicnic.de
  • mail.kernelpicnic.de
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • Let's Encrypt Authority X3
validity period
Not valid before
2020-02-11
Not valid after
2020-05-11
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
D9:3A:4D:DA:28:95:5C:39:E1:94:20:12:74:B5:2A:57:73:98:EC:B2:0A:2C:4C:C8:E9:F6:80:3E:7A:88:C3:ED
SHA1
32:A1:EA:D9:EA:FD:93:E0:17:BA:B7:D4:07:C8:71:3E:25:B8:A8:BE
X509v3 extensions
subjectKeyIdentifier
  • 13:37:7F:A2:A5:64:FF:18:3A:39:49:51:6C:69:D5:2A:BE:01:B1:57
authorityKeyIdentifier
  • keyid:A8:4A:6A:63:04:7D:DD:BA:E6:D1:39:B7:A6:45:65:EF:F3:A8:EC:A1
authorityInfoAccess
  • OCSP - URI:http://ocsp.int-x3.letsencrypt.org
  • CA Issuers - URI:http://cert.int-x3.letsencrypt.org/
certificatePolicies
  • Policy: 2.23.140.1.2.1
  • Policy: 1.3.6.1.4.1.44947.1.1.1
  • CPS: http://cps.letsencrypt.org
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 5E:A7:73:F9:DF:56:C0:E7:B5:36:48:7D:D0:49:E0:32:
  • 7A:91:9A:0C:84:A1:12:12:84:18:75:96:81:71:45:58
  • Timestamp : Feb 11 18:33:09.171 2020 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:20:38:25:BC:A9:07:0A:4B:52:9A:3B:0C:39:
  • C2:1A:DD:40:CB:72:B0:18:E3:22:30:59:2C:66:A7:7A:
  • 14:3F:C1:77:02:21:00:B3:8C:6B:9A:03:34:6D:0C:96:
  • 40:95:10:E6:98:98:F4:CF:8F:C8:44:E6:1E:48:C1:C8:
  • FC:6A:87:72:0C:94:9C
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : B2:1E:05:CC:8B:A2:CD:8A:20:4E:87:66:F9:2B:B9:8A:
  • 25:20:67:6B:DA:FA:70:E7:B2:49:53:2D:EF:8B:90:5E
  • Timestamp : Feb 11 18:33:09.153 2020 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:44:02:20:3E:20:95:55:AF:4C:21:42:E6:F0:EE:EE:
  • 74:04:6B:AC:1E:26:45:A4:D2:BC:11:DA:BE:F6:96:A2:
  • 54:1B:7A:64:02:20:45:62:E3:4C:49:1C:AC:B5:54:62:
  • F7:2B:9B:41:C1:A8:91:AB:62:03:86:1C:05:22:60:F6:
  • 33:98:A3:B2:A9:65

DANE

DNS-based Authentication of Named Entities (DANE) is a protocol to allow X.509 certificates to be bound to DNS using TLSA records and DNSSEC.

Name Options DNSSEC Matches
_25._tcp.mail.kernelpicnic.de
  • DANE-EE: Domain Issued Certificate
  • Use subject public key
  • SHA-256 Hash
error
Debug
valid