SSL-Tools

SSL check results of mail.quantlink.de

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Discover if the mail servers for mail.quantlink.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 Mon, 14 Sep 2026 00:30:07 +0000

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

Servers

Incoming Mails

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

Hostname / IP address Priority STARTTLS Certificates Protocol
mail.quantlink.de
49.13.55.87
 -
supported
mail.quantlink.de
DANE
errors
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
1 s
mail.quantlink.de
2a01:4f8:c013:8568::1
 -
supported
mail.quantlink.de
DANE
errors
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
1 s

Outgoing Mails

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

Certificates

First seen at:

CN=mail.quantlink.de

Certificate chain
  • mail.quantlink.de
    • remaining
    • 256 bit
    • ecdsa-with-SHA384
      • YE2
        • remaining
        • 384 bit
        • ecdsa-with-SHA384
          • Root YE
            • remaining
            • 384 bit
            • ecdsa-with-SHA384
              • ISRG Root X2 (Certificate is self-signed.)
                • remaining
                • 384 bit
                • ecdsa-with-SHA384
Subject
Common Name (CN)
  • mail.quantlink.de
Alternative Names
  • mail.quantlink.de
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • YE2
validity period
Not valid before
2026-09-09
Not valid after
2026-12-08
This certifcate has been verified for the following usages:
  • Digital Signature
  • TLS Web Server Authentication
Fingerprints
SHA256
84:4B:BE:E1:4C:69:22:BB:5E:D9:92:E6:46:65:16:E5:4F:55:2A:8C:40:F2:28:BC:C9:41:8A:3B:1A:F7:5D:20
SHA1
0E:15:59:E6:B4:59:2F:CA:E0:69:D0:A0:EC:F3:89:25:BB:E1:7B:44
X509v3 extensions
subjectKeyIdentifier
  • 9C:87:B1:74:71:44:17:E1:F5:BF:A9:90:4A:3D:9C:EF:01:30:7C:A6
authorityKeyIdentifier
  • keyid:B9:59:F2:8E:CF:22:F0:86:D3:37:48:FF:76:14:18:BA:82:D8:55:87
authorityInfoAccess
  • CA Issuers - URI:http://ye2.i.lencr.org/
certificatePolicies
  • Policy: 2.23.140.1.2.1
crlDistributionPoints
  • Full Name:
  • URI:http://ye2.c.lencr.org/17.crl
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : D8:09:55:3B:94:4F:7A:FF:C8:16:19:6F:94:4F:85:AB:
  • B0:F8:FC:5E:87:55:26:0F:15:D1:2E:72:BB:45:4B:14
  • Timestamp : Sep 9 08:27:58.888 2026 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:8D:01:92:3E:04:DC:50:27:72:7E:36:
  • 8C:66:E5:7C:4E:04:0C:81:AD:D2:B9:57:35:73:B1:2A:
  • 33:AA:D7:0C:4D:02:20:44:62:99:35:4E:94:E7:A3:E7:
  • C9:E7:BE:8F:D5:B9:32:4A:22:E0:B0:AA:05:37:5F:A8:
  • 72:76:02:79:42:BD:42
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 26:E3:64:6E:58:69:21:23:BC:34:3F:47:24:35:9B:37:
  • 92:CD:24:5A:88:D8:15:D3:93:33:FD:99:18:AB:47:23
  • Timestamp : Sep 9 08:27:56.848 2026 GMT
  • Extensions: 00:00:05:00:3F:14:73:8B
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:F0:07:CA:A7:F9:F5:9B:9A:3F:48:22:
  • D4:FF:42:F6:C7:16:7F:FB:AB:DC:09:17:DC:6D:AE:3F:
  • BA:9F:6D:F4:64:02:20:4D:A1:13:6E:FE:A0:8D:6C:38:
  • 33:53:C3:37:0C:D0:1E:8B:BB:A3:D8:CA:51:4D:7A:FA:
  • 7E:32:9A:02:FA:D2:78

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.quantlink.de
  • DANE-EE: Domain Issued Certificate
  • Use subject public key
  • SHA-512 Hash
error
Debug
—
_25._tcp.mail.quantlink.de
  • DANE-EE: Domain Issued Certificate
  • Use full certificate
  • SHA-256 Hash
error
Debug
—
_25._tcp.mail.quantlink.de
  • DANE-TA: Trust Anchor Assertion
  • Use subject public key
  • SHA-256 Hash
error
Debug
—
_25._tcp.mail.quantlink.de
  • DANE-EE: Domain Issued Certificate
  • Use subject public key
  • SHA-256 Hash
error
Debug
—
_25._tcp.mail.quantlink.de
  • DANE-TA: Trust Anchor Assertion
  • Use subject public key
  • SHA-512 Hash
error
Debug
—
_25._tcp.mail.quantlink.de
  • DANE-TA: Trust Anchor Assertion
  • Use full certificate
  • SHA-512 Hash
error
Debug
—
_25._tcp.mail.quantlink.de
  • DANE-TA: Trust Anchor Assertion
  • Use full certificate
  • SHA-256 Hash
error
Debug
—
_25._tcp.mail.quantlink.de
  • DANE-EE: Domain Issued Certificate
  • Use full certificate
  • SHA-512 Hash
error
Debug
—