SSL-Tools

SSL check results of www.offermann-koeln.de

NEW You can also bulk check multiple servers.

Discover if the mail servers for www.offermann-koeln.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

JSON Refresh

Report created Wed, 27 May 2020 09:35:23 +0000

We can not guarantee a secure connection to the mailservers of www.offermann-koeln.de!

Please contact the operator of www.offermann-koeln.de and ask him or her to solve this problem. This result stays accessible under the following address:

/mailservers/www.offermann-koeln.de

Servers

Incoming Mails

These servers are responsible for incoming mails to @www.offermann-koeln.de addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
www.offermann-koeln.de
5.252.226.157
 -
supported
mail.offermann-koeln.de
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
2 s
www.offermann-koeln.de
2a03:4000:40:da:42c:3cff:fe71:ac45
Results incomplete
- not checked
DANE
missing
PFS
not checked
Heartbleed
not checked
Weak ciphers
not checked
1 s

Outgoing Mails

We have not received any emails from a @www.offermann-koeln.de address so far. Test mail delivery

Certificates

First seen at:

CN=mail.offermann-koeln.de

Certificate chain
Subject
Common Name (CN)
  • mail.offermann-koeln.de
Alternative Names
  • mail.offermann-koeln.de
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • Let's Encrypt Authority X3
validity period
Not valid before
2020-05-10
Not valid after
2020-08-08
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
D0:4E:6F:7D:8B:AC:96:05:32:5C:58:57:01:90:25:DD:5C:FD:A3:0D:95:74:8B:39:E6:70:1C:A9:15:AE:67:6F
SHA1
20:00:A2:88:16:92:1D:7B:B1:6A:16:8D:5B:7A:3C:58:2F:EF:CF:9B
X509v3 extensions
subjectKeyIdentifier
  • 11:E5:DE:51:8A:D9:F1:9B:6B:D4:43:1A:22:2C:A3:3F:72:2F:6D:3D
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 : May 10 11:30:15.402 2020 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:D7:31:82:AB:2B:35:EB:5A:2E:49:9A:
  • 8A:5E:4B:44:AB:1C:3C:18:4F:3E:C5:6F:AB:C7:A0:ED:
  • 5E:92:E0:A7:ED:02:20:3F:B1:A9:12:54:79:73:78:AD:
  • 1A:8C:A2:35:BE:2B:CE:F8:4E:FA:06:18:98:EF:C3:4C:
  • C2:7F:5C:84:CF:71:FA
  • 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 : May 10 11:30:15.395 2020 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:F2:7B:8E:34:7A:C8:AF:27:E0:ED:D0:
  • 0E:DF:9D:22:EB:AE:35:F7:A9:A5:E1:20:15:F5:D1:C4:
  • 2B:C8:C9:56:70:02:21:00:E0:F2:0A:E0:AD:38:D9:D6:
  • 73:F4:12:C6:9B:A4:1F:8C:E7:53:C6:B1:BE:10:6D:19:
  • 6E:2D:3F:F4:EF:96:7C:0F