SSL check results of atn.de

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Discover if the mail servers for atn.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 Tue, 03 Dec 2019 12:05:22 +0000

The mailservers of atn.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 @atn.de addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
mail.atn.de
85.25.63.163
10
supported
frank-gross.de
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
12 s

Outgoing Mails

We have received emails from these servers with @atn.de sender addresses. Test mail delivery

Host TLS Version & Cipher
mail.atn.de (85.25.63.163)
TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384

Certificates

First seen at:

CN=frank-gross.de

Certificate chain
Subject
Common Name (CN)
  • frank-gross.de
Alternative Names
  • frank-gross.de
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • Let's Encrypt Authority X3
validity period
Not valid before
2019-11-12
Not valid after
2020-02-10
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
36:21:B8:23:1F:A9:61:2F:A6:26:88:A7:05:23:8C:D7:DA:52:91:97:95:76:B6:C5:CF:51:E0:C3:0C:CE:11:D1
SHA1
31:D5:C8:BC:BB:15:0F:03:24:E6:3E:2A:A2:AE:50:B3:B8:ED:D9:0D
X509v3 extensions
subjectKeyIdentifier
  • 3A:F9:C2:FB:3C:74:BD:AF:01:1A:D4:89:6D:C0:D8:62:0A:1A:B4:32
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 : F0:95:A4:59:F2:00:D1:82:40:10:2D:2F:93:88:8E:AD:
  • 4B:FE:1D:47:E3:99:E1:D0:34:A6:B0:A8:AA:8E:B2:73
  • Timestamp : Nov 12 16:17:08.748 2019 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:E4:11:5A:0F:94:27:A9:75:12:8E:47:
  • 74:60:B7:85:BD:7E:BF:5D:EE:56:7B:04:66:BC:3D:6A:
  • 37:6A:CB:A4:CE:02:21:00:D1:53:D1:A6:49:B5:27:DF:
  • 0D:C5:31:4B:03:F7:49:F0:CE:97:96:55:F6:F3:0D:BD:
  • 3E:32:2B:D8:14:26:37:F3
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 07:B7:5C:1B:E5:7D:68:FF:F1:B0:C6:1D:23:15:C7:BA:
  • E6:57:7C:57:94:B7:6A:EE:BC:61:3A:1A:69:D3:A2:1C
  • Timestamp : Nov 12 16:17:08.786 2019 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:20:1A:C1:DC:A3:46:55:98:55:01:42:FD:6B:
  • 87:D7:B1:D5:61:B8:00:ED:F0:5B:38:93:8F:E7:76:16:
  • 71:BC:F2:22:02:21:00:D0:BF:3D:1C:18:81:0D:67:83:
  • 90:36:57:0B:1F:62:68:96:19:CD:F9:CF:4A:AA:14:7C:
  • 4D:A1:31:36:7D:1E:96