SSL-Tools

SSL check results of online.de

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Discover if the mail servers for online.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 Thu, 03 Apr 2025 16:49:46 +0000

No connection to the mailservers of online.de could be established.

Servers

Incoming Mails

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

Hostname / IP address Priority STARTTLS Certificates Protocol
mx00.emig.kundenserver.de
212.227.15.40
Results incomplete
10
supported
mx.kundenserver.de
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
1 s
mx01.emig.kundenserver.de
217.72.192.66
Results incomplete
10
supported
mx.kundenserver.de
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
1 s

Outgoing Mails

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

Host TLS Version & Cipher
mout.kundenserver.de (217.72.192.74)
TLSv1.3 TLS_AES_256_GCM_SHA384
mout.kundenserver.de (212.227.17.24)
TLSv1.3 TLS_AES_256_GCM_SHA384
mout.kundenserver.de (212.227.126.133)
TLSv1.3 TLS_AES_256_GCM_SHA384
mout.kundenserver.de (217.72.192.73)
TLSv1.3 TLS_AES_256_GCM_SHA384
mout.kundenserver.de (212.227.126.135)
TLSv1.3 TLS_AES_256_GCM_SHA384
mout.kundenserver.de (212.227.17.13)
TLSv1.3 TLS_AES_256_GCM_SHA384
mout.kundenserver.de (212.227.126.130)
TLSv1.3 TLS_AES_256_GCM_SHA384
mout.kundenserver.de (217.72.192.75)
TLSv1.3 TLS_AES_256_GCM_SHA384
unknown (212.227.126.187)
TLSv1.3 TLS_AES_256_GCM_SHA384
mout.kundenserver.de (212.227.17.10)
TLSv1.2 ECDHE-RSA-AES128-GCM-SHA256
mout.kundenserver.de (212.227.126.131)
TLSv1.2 ECDHE-RSA-AES128-GCM-SHA256

Certificates

First seen at:

CN=mx.kundenserver.de,O=IONOS SE,L=Montabaur,ST=Rheinland-Pfalz,C=DE

Certificate chain
Subject
Country (C)
  • DE
State (ST)
  • Rheinland-Pfalz
Locality (L)
  • Montabaur
Organization (O)
  • IONOS SE
Common Name (CN)
  • mx.kundenserver.de
Alternative Names
  • mx.kundenserver.de
  • mx00.kundenserver.de
  • mx01.kundenserver.de
  • mx00.emig.kundenserver.de
  • mx01.emig.kundenserver.de
  • mx00.ionos.co.uk
  • mx00.ionos.de
  • mx00.ionos.es
  • mx00.ionos.fr
  • mx00.ionos.it
  • mx01.ionos.co.uk
  • mx01.ionos.de
  • mx01.ionos.es
  • mx01.ionos.fr
  • mx01.ionos.it
Issuer
Country (C)
  • DE
Organization (O)
  • Deutsche Telekom Security GmbH
Common Name (CN)
  • Telekom Security ServerID OV Class 2 CA
validity period
Not valid before
2024-05-14
Not valid after
2025-05-18
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Client Authentication
  • TLS Web Server Authentication
Fingerprints
SHA256
0B:32:E2:90:D9:3A:D1:1F:FA:B9:E2:6F:5E:CC:8B:F5:F0:B8:22:D2:67:E9:35:2D:5B:EC:81:DB:78:30:0A:01
SHA1
A7:68:65:5A:45:2A:BB:D6:20:C5:FB:8F:3D:41:86:39:C3:E0:C7:F2
X509v3 extensions
authorityKeyIdentifier
  • keyid:1C:05:93:B1:7F:A8:34:30:8C:52:E0:96:40:A0:72:A3:10:5D:E0:FF
subjectKeyIdentifier
  • 2C:4C:F2:97:F3:1B:9A:1E:37:AD:DF:9C:8A:CA:57:F6:BB:7D:D7:E8
certificatePolicies
  • Policy: 2.23.140.1.2.2
  • CPS: http://docs.serverid.telesec.de/cps/serverid.htm
crlDistributionPoints
  • Full Name:
  • URI:http://crl.serverid.telesec.de/rl/Telekom_Security_ServerID_OV_Class_2_CA.crl
authorityInfoAccess
  • OCSP - URI:http://ocsp.serverid.telesec.de/ocspr
  • CA Issuers - URI:http://crt.serverid.telesec.de/crt/Telekom_Security_ServerID_OV_Class_2_CA.crt
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : CC:FB:0F:6A:85:71:09:65:FE:95:9B:53:CE:E9:B2:7C:
  • 22:E9:85:5C:0D:97:8D:B6:A9:7E:54:C0:FE:4C:0D:B0
  • Timestamp : May 14 10:13:43.744 2024 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:C5:F0:0C:CA:9D:D2:27:F3:36:E1:FA:
  • CB:29:AD:2D:70:00:16:73:18:2E:F7:CB:A8:8C:BF:8C:
  • 13:52:62:CC:84:02:20:61:05:39:78:FB:14:7D:68:56:
  • 8C:6A:C3:61:07:32:C4:A1:92:EE:36:BA:CE:08:83:BE:
  • F5:39:1A:94:2D:0C:22
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : CF:11:56:EE:D5:2E:7C:AF:F3:87:5B:D9:69:2E:9B:E9:
  • 1A:71:67:4A:B0:17:EC:AC:01:D2:5B:77:CE:CC:3B:08
  • Timestamp : May 14 10:13:43.640 2024 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:F5:3D:70:35:A2:34:7B:98:58:5D:57:
  • 64:18:75:68:FC:76:2F:23:32:50:4F:43:1D:30:24:74:
  • 2B:D8:78:AF:D7:02:21:00:AA:30:45:97:3E:98:20:3F:
  • DA:2A:13:9B:D6:86:89:7E:60:E1:5E:69:7F:79:64:D1:
  • 71:85:D1:DD:4E:22:DE:38
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 4E:75:A3:27:5C:9A:10:C3:38:5B:6C:D4:DF:3F:52:EB:
  • 1D:F0:E0:8E:1B:8D:69:C0:B1:FA:64:B1:62:9A:39:DF
  • Timestamp : May 14 10:13:43.698 2024 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:FB:0F:7C:83:82:35:18:E6:5B:E8:97:
  • E4:FC:5F:A8:39:6C:DC:8D:EE:0F:B6:2C:76:2C:B5:EA:
  • CD:73:FA:F9:83:02:21:00:94:8D:CC:49:C1:20:D9:EF:
  • 5B:92:CE:EA:C5:5F:00:45:A6:41:F7:A4:89:CF:EF:9E:
  • EC:B3:C9:56:12:35:95:D4
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 28:E2:81:38:FD:83:21:45:E9:A9:D6:AA:75:37:6D:83:
  • 77:A8:85:12:B3:C0:7F:72:41:48:21:DC:BD:E9:8C:66
  • Timestamp : May 14 10:13:44.303 2024 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:20:17:D7:00:2B:FF:D4:85:87:01:13:3B:4E:
  • 43:F7:34:54:89:1C:9C:FB:D3:AA:11:74:F8:B4:67:E5:
  • 3A:74:D5:1D:02:21:00:A8:A2:51:B6:9F:93:57:59:1E:
  • 43:BA:0C:EC:AE:B8:0D:76:4B:19:90:5E:56:58:7F:8C:
  • 26:4C:F4:F1:05:70:98
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : A2:E3:0A:E4:45:EF:BD:AD:9B:7E:38:ED:47:67:77:53:
  • D7:82:5B:84:94:D7:2B:5E:1B:2C:C4:B9:50:A4:47:E7
  • Timestamp : May 14 10:13:43.900 2024 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:82:A7:B5:2F:A2:43:F9:B0:55:1A:89:
  • 20:61:F4:66:28:F2:A2:DF:7E:F9:B3:B1:79:6C:50:02:
  • 37:8B:D7:22:3E:02:21:00:AE:52:56:B9:6D:B0:9D:34:
  • 70:3F:8C:27:1C:BD:A1:F7:7C:53:44:06:32:99:CD:1D:
  • D8:C6:AE:43:42:A2:44:93