SSL check results of grellmann.net

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Discover if the mail servers for grellmann.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 Wed, 08 Apr 2020 13:39:15 +0000

The mailservers of grellmann.net can be reached through a secure connection.

Servers

Incoming Mails

These servers are responsible for incoming mails to @grellmann.net addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
grellmann.net
89.182.80.17
10
supported
grellmann.net
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
19 s

Outgoing Mails

We have received emails from these servers with @grellmann.net sender addresses. Test mail delivery

Host TLS Version & Cipher
mo6-p00-ob.smtp.rzone.de (IPv6:2a01:238:20a:202:5300::1)
TLSv1.3 TLS_AES_256_GCM_SHA384
mo6-p00-ob.smtp.rzone.de (IPv6:2a01:238:20a:202:5300::5)
TLSv1.3 TLS_AES_256_GCM_SHA384

Certificates

First seen at:

CN=grellmann.net

Certificate chain
Subject
Common Name (CN)
  • grellmann.net
Alternative Names
  • grellmann.net
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • Let's Encrypt Authority X3
validity period
Not valid before
2020-03-28
Not valid after
2020-06-26
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
AC:A3:33:50:5E:3D:B5:E0:77:49:6C:03:18:E5:4E:1F:E9:D6:B9:D7:DE:62:35:E3:65:D5:EF:CC:88:AB:E7:88
SHA1
34:15:0E:C2:E7:F8:24:D4:46:88:0A:63:94:E7:BE:C2:AD:7E:96:73
X509v3 extensions
subjectKeyIdentifier
  • C5:F8:7C:7B:08:2B:DB:8C:5F:8E:27:E0:B0:EF:38:D2:ED:BF:8D:DD
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 : Mar 28 13:00:40.719 2020 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:44:02:20:3A:CB:F3:C8:F5:30:85:C3:51:99:D9:D1:
  • 34:61:DE:9E:F0:66:F5:0A:1C:99:9E:A2:3B:7C:16:BF:
  • A9:92:A9:C3:02:20:1C:A6:43:7C:EC:C5:AA:00:2F:13:
  • 8E:C8:2F:26:D1:FF:73:69:03:40:84:27:C6:CD:10:B5:
  • 6B:D4:8B:89:B4:8B
  • 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 : Mar 28 13:00:40.701 2020 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:20:57:6B:28:40:47:3E:1F:B9:8F:22:15:89:
  • 70:DC:45:B0:CD:E5:A9:1D:BF:56:0E:7E:12:42:AF:A9:
  • 03:E5:D5:1A:02:21:00:C7:14:33:1A:78:68:EC:FA:2E:
  • 78:0B:28:0F:DE:18:51:17:0A:E1:2D:58:B7:9E:04:B1:
  • 73:95:CE:12:AB:3A:A8