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SSL check results of w4w.de

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Discover if the mail servers for w4w.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 Tue, 18 Aug 2020 09:01:05 +0000

The mailservers of w4w.de can be reached through a secure connection.

Servers

Incoming Mails

These servers are responsible for incoming mails to @w4w.de addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
mail.w4w.de
87.225.242.3
 10
supported
mail.w4w.de
DANE
valid
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
2 s
mail.w4w.eu
2001:bf0:70:1::23
 20
supported
mail.w4w.eu
DANE
valid
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
2 s
mail.w4w.eu
87.225.242.23
 20
supported
mail.w4w.eu
DANE
valid
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
2 s

Outgoing Mails

We have not received any emails from a @w4w.de address so far. Test mail delivery

Certificates

First seen at:

CN=mail.w4w.de

Certificate chain
Subject
Common Name (CN)
  • mail.w4w.de
Alternative Names
  • mail.w4w.de
  • mail.w4w.net
  • pop3.w4w.de
  • pop3.w4w.net
  • smtp.w4w.de
  • smtp.w4w.net
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • Let's Encrypt Authority X3
validity period
Not valid before
2020-06-27
Not valid after
2020-09-25
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
85:AF:36:15:57:91:A7:93:9A:A7:BA:60:1B:38:08:08:AA:7E:39:D2:77:AF:A7:27:33:E7:3F:84:DB:5D:64:72
SHA1
56:2F:BC:5D:E5:E5:96:2A:C1:E8:D1:6D:AD:45:DE:9F:24:E7:51:FA
X509v3 extensions
subjectKeyIdentifier
  • 2B:82:32:5B:8B:62:EC:B7:5C:46:92:9B:D4:8C:32:AE:0F:80:1A:79
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 : E7:12:F2:B0:37:7E:1A:62:FB:8E:C9:0C:61:84:F1:EA:
  • 7B:37:CB:56:1D:11:26:5B:F3:E0:F3:4B:F2:41:54:6E
  • Timestamp : Jun 27 23:00:44.229 2020 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:C4:3F:00:75:67:1C:37:42:F5:12:42:
  • 8A:FB:7E:44:C9:65:F2:AC:CF:46:FB:D1:9C:DE:04:66:
  • CB:05:29:22:DC:02:21:00:9D:9F:BA:A8:4A:39:49:58:
  • 9E:AF:61:68:49:92:2C:E2:5A:F7:E5:33:43:A4:3E:29:
  • E5:BA:88:BD:24:38:50:B8
  • 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 : Jun 27 23:00:44.291 2020 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:20:5C:BF:BA:52:3C:7D:D7:83:CA:6C:22:72:
  • A8:A9:72:C4:46:54:27:1D:D7:6D:B8:4D:CD:BA:4A:E3:
  • D4:B9:69:6B:02:21:00:C7:CB:CB:B6:13:73:C4:DB:3A:
  • 63:6D:AC:F2:88:1F:9F:D3:59:1F:F0:75:D2:DF:88:60:
  • 99:86:24:5A:C7:4C:54
First seen at:

CN=mail.w4w.eu

Certificate chain
Subject
Common Name (CN)
  • mail.w4w.eu
Alternative Names
  • mail.block-house.ch
  • mail.freebsd-server.de
  • mail.heldundteam.de
  • mail.safeconnect.de
  • mail.w4w.eu
  • relay.kinderhut.de
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • Let's Encrypt Authority X3
validity period
Not valid before
2020-08-15
Not valid after
2020-11-13
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
48:38:80:1F:02:86:D3:2E:8B:C9:B4:C9:A1:50:E6:6A:63:B2:92:79:D1:2B:A5:A6:7A:DB:FB:B3:CD:07:D2:3E
SHA1
F4:34:82:18:7A:7D:32:3C:19:2E:A8:54:65:78:40:67:AC:D5:40:87
X509v3 extensions
subjectKeyIdentifier
  • 1B:38:DC:4F:DA:9D:A1:FB:30:42:1A:8D:D2:8F:71:B8:17:FB:BE:9A
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 : Aug 15 02:16:04.782 2020 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:DE:B9:CA:54:64:06:2F:EA:8C:C1:FB:
  • 0E:CD:9F:38:73:C7:C6:1B:21:F6:B4:6A:01:25:08:B3:
  • F3:51:D9:47:88:02:21:00:FA:3E:65:F8:D2:4D:16:2D:
  • 07:F9:BF:B7:3F:49:45:B4:6C:A4:76:BD:92:C1:F2:6E:
  • 92:A3:CC:E8:F4:4A:4A:B2
  • 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 : Aug 15 02:16:04.764 2020 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:20:32:96:4B:97:81:78:15:19:84:10:1D:C2:
  • 83:F1:83:3A:E8:9D:13:97:07:A7:B5:4E:F3:D4:06:30:
  • 08:9F:D9:16:02:21:00:DD:EC:2E:D5:61:0F:F6:0E:2D:
  • ED:A4:56:33:C4:E7:53:2A:CB:13:04:C1:5E:93:DD:80:
  • AA:5C:B3:20:F5:6C:F0

DANE

DNS-based Authentication of Named Entities (DANE) is a protocol to allow X.509 certificates to be bound to DNS using TLSA records and DNSSEC.

Name Options DNSSEC Matches
_25._tcp.mail.w4w.de
  • DANE-EE: Domain Issued Certificate
  • Use subject public key
  • SHA-256 Hash
valid
valid
_25._tcp.mail.w4w.eu
  • DANE-EE: Domain Issued Certificate
  • Use subject public key
  • SHA-256 Hash
valid
valid