SSL check results of gkm.de

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Discover if the mail servers for gkm.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, 27 Jul 2021 15:22:56 +0000

The mailservers of gkm.de can be reached through a secure connection.

Servers

Incoming Mails

These servers are responsible for incoming mails to @gkm.de addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
mail1.gkm.de
193.16.140.51
10
supported
mail1.gkm.de
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • SSLv3
12 s
mail2.gkm.de
193.16.140.53
20
supported
mail2.gkm.de
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • SSLv3
12 s

Outgoing Mails

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

Host TLS Version & Cipher
mail1.gkm.de (193.16.140.51)
TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384

Certificates

First seen at:

CN=mail1.gkm.de

Certificate chain
Subject
Common Name (CN)
  • mail1.gkm.de
Alternative Names
  • mail1.gkm.de
  • www.mail1.gkm.de
Issuer
Country (C)
  • US
Organization (O)
  • DigiCert Inc
Common Name (CN)
  • RapidSSL TLS DV RSA Mixed SHA256 2020 CA-1
validity period
Not valid before
2021-07-22
Not valid after
2022-08-22
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
6C:03:F1:08:B6:81:BB:7F:DE:A5:3C:69:37:61:CC:7B:12:06:CF:A8:5A:B5:08:D3:1F:8E:F8:C2:01:B1:F2:7B
SHA1
98:D2:25:8B:72:DA:06:89:34:56:AE:40:57:9A:6A:8E:A9:46:B3:C9
X509v3 extensions
authorityKeyIdentifier
  • keyid:A4:8D:E5:BE:7C:79:E4:70:23:6D:2E:29:34:AD:23:58:DC:F5:31:7F
subjectKeyIdentifier
  • 4F:F9:14:27:18:59:4C:5A:62:A7:46:95:3D:57:C9:96:D2:B6:B3:5C
crlDistributionPoints
  • Full Name:
  • URI:http://crl3.digicert.com/RapidSSLTLSDVRSAMixedSHA2562020CA-1.crl
  • Full Name:
  • URI:http://crl4.digicert.com/RapidSSLTLSDVRSAMixedSHA2562020CA-1.crl
certificatePolicies
  • Policy: 2.23.140.1.2.1
  • CPS: http://www.digicert.com/CPS
authorityInfoAccess
  • OCSP - URI:http://ocsp.digicert.com
  • CA Issuers - URI:http://cacerts.digicert.com/RapidSSLTLSDVRSAMixedSHA2562020CA-1.crt
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 46:A5:55:EB:75:FA:91:20:30:B5:A2:89:69:F4:F3:7D:
  • 11:2C:41:74:BE:FD:49:B8:85:AB:F2:FC:70:FE:6D:47
  • Timestamp : Jul 22 09:02:50.172 2021 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:FD:81:50:00:2C:4E:5F:E0:21:B7:F9:
  • 79:FD:CA:53:12:64:4D:78:D9:BA:7B:F5:F8:00:18:E8:
  • 50:19:AE:78:C8:02:21:00:86:DD:AA:E9:91:FF:C3:68:
  • A8:0C:46:59:D0:46:85:7A:EE:E5:9C:61:06:46:3A:97:
  • 15:1B:47:DC:28:EC:96:3C
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 41:C8:CA:B1:DF:22:46:4A:10:C6:A1:3A:09:42:87:5E:
  • 4E:31:8B:1B:03:EB:EB:4B:C7:68:F0:90:62:96:06:F6
  • Timestamp : Jul 22 09:02:50.193 2021 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:20:1C:29:E3:F1:D7:7E:21:C3:14:1E:D8:3E:
  • 85:08:62:E9:25:6D:2F:C9:95:FC:C8:EF:8A:61:C3:C5:
  • B4:52:C5:36:02:21:00:9C:CC:88:61:6F:2C:0B:6C:4A:
  • A9:70:63:38:88:39:0F:EC:D9:AA:79:91:E7:10:53:41:
  • E7:E9:E5:1F:FF:97:14
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : DF:A5:5E:AB:68:82:4F:1F:6C:AD:EE:B8:5F:4E:3E:5A:
  • EA:CD:A2:12:A4:6A:5E:8E:3B:12:C0:20:44:5C:2A:73
  • Timestamp : Jul 22 09:02:50.172 2021 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:9F:88:8F:76:23:42:EF:7F:D8:19:7E:
  • E2:61:5C:3F:64:E3:A9:F7:91:21:55:01:44:68:C3:21:
  • BF:12:72:05:AD:02:20:57:AB:4C:87:F4:36:09:7C:8C:
  • F7:E4:96:A6:79:C3:3C:15:78:1B:D4:A8:D2:F9:5F:70:
  • 34:D1:9D:0D:14:77:33
First seen at:

CN=mail2.gkm.de

Certificate chain
Subject
Common Name (CN)
  • mail2.gkm.de
Alternative Names
  • mail2.gkm.de
  • www.mail2.gkm.de
Issuer
Country (C)
  • US
Organization (O)
  • DigiCert Inc
Common Name (CN)
  • RapidSSL TLS DV RSA Mixed SHA256 2020 CA-1
validity period
Not valid before
2021-07-22
Not valid after
2022-08-22
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
28:AF:6D:07:A1:86:95:FE:38:7D:63:11:50:8D:95:58:6F:1A:4B:EB:F6:0F:04:21:17:38:06:01:2E:9A:3C:F2
SHA1
FB:61:32:0C:29:5E:BD:43:0A:15:AD:BF:FE:1F:5F:DF:B6:3E:B2:44
X509v3 extensions
authorityKeyIdentifier
  • keyid:A4:8D:E5:BE:7C:79:E4:70:23:6D:2E:29:34:AD:23:58:DC:F5:31:7F
subjectKeyIdentifier
  • 53:6B:AA:91:D1:17:6D:A6:44:EA:F0:5C:3A:04:9D:68:B7:9A:3D:0E
crlDistributionPoints
  • Full Name:
  • URI:http://crl3.digicert.com/RapidSSLTLSDVRSAMixedSHA2562020CA-1.crl
  • Full Name:
  • URI:http://crl4.digicert.com/RapidSSLTLSDVRSAMixedSHA2562020CA-1.crl
certificatePolicies
  • Policy: 2.23.140.1.2.1
  • CPS: http://www.digicert.com/CPS
authorityInfoAccess
  • OCSP - URI:http://ocsp.digicert.com
  • CA Issuers - URI:http://cacerts.digicert.com/RapidSSLTLSDVRSAMixedSHA2562020CA-1.crt
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 46:A5:55:EB:75:FA:91:20:30:B5:A2:89:69:F4:F3:7D:
  • 11:2C:41:74:BE:FD:49:B8:85:AB:F2:FC:70:FE:6D:47
  • Timestamp : Jul 22 09:13:57.964 2021 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:D8:66:C0:FB:C6:9F:D4:14:F5:A1:A8:
  • EB:05:F7:28:33:62:15:93:61:BC:92:3E:B5:D8:4A:5B:
  • A1:DE:64:C9:7E:02:20:39:4D:FD:03:FB:E6:43:2D:FB:
  • 13:22:6D:5A:39:07:46:99:79:51:6C:54:17:6A:64:69:
  • 9D:51:6C:1D:52:D7:20
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 51:A3:B0:F5:FD:01:79:9C:56:6D:B8:37:78:8F:0C:A4:
  • 7A:CC:1B:27:CB:F7:9E:88:42:9A:0D:FE:D4:8B:05:E5
  • Timestamp : Jul 22 09:13:57.998 2021 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:44:02:20:53:B1:94:A9:49:EF:4A:D2:34:DB:37:1C:
  • 78:EC:11:D3:07:7B:90:0D:C5:2A:6E:D0:D8:27:ED:10:
  • 7B:6A:CE:0D:02:20:4C:47:A3:C1:B6:DC:F1:9B:39:8F:
  • B6:FD:B5:03:84:1B:01:C3:B8:4C:38:D4:EC:4D:93:ED:
  • 90:02:25:85:68:67
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 41:C8:CA:B1:DF:22:46:4A:10:C6:A1:3A:09:42:87:5E:
  • 4E:31:8B:1B:03:EB:EB:4B:C7:68:F0:90:62:96:06:F6
  • Timestamp : Jul 22 09:13:57.965 2021 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:DE:51:23:66:DA:54:92:DD:B7:F8:89:
  • C5:9A:70:CD:55:F3:B4:43:60:4C:2C:10:A2:B3:1C:89:
  • 93:C2:A0:DF:37:02:20:0C:79:83:C7:A6:63:1E:01:B5:
  • 19:AB:59:B2:EB:39:85:9D:F9:F2:AB:94:9B:6E:BF:81:
  • 51:AC:69:5E:8A:62:59