SSL-Tools

SSL check results of 6bb.zone

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Discover if the mail servers for 6bb.zone 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 Sun, 24 Aug 2025 00:30:31 +0000

We can not guarantee a secure connection to the mailservers of 6bb.zone!

Please contact the operator of 6bb.zone and ask him or her to solve this problem. This result stays accessible under the following address:

/mailservers/6bb.zone

Servers

Incoming Mails

These servers are responsible for incoming mails to @6bb.zone addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
mx.fsrv.xyz
2001:67c:828:f100:be24:11ff:fe07:b89
Results incomplete
10
unsupported
not checked
DANE
missing
PFS
not checked
Heartbleed
not checked
Weak ciphers
not checked
1 s
mx.fsrv.xyz
78.46.38.168
 10
supported
fsrv.xyz
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
1 s

Outgoing Mails

We have not received any emails from a @6bb.zone address so far. Test mail delivery

Certificates

First seen at:

CN=fsrv.xyz

Certificate chain
  • fsrv.xyz
    • remaining
    • 256 bit
    • ecdsa-with-SHA384
      • E5
        • remaining
        • 384 bit
        • sha256WithRSAEncryption
          • ISRG Root X1 (Certificate is self-signed.)
            • remaining
            • 4096 bit
            • sha256WithRSAEncryption
Subject
Common Name (CN)
  • fsrv.xyz
Alternative Names
  • *.fsrv.xyz
  • fsrv.xyz
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • E5
validity period
Not valid before
2025-07-10
Not valid after
2025-10-08
This certifcate has been verified for the following usages:
  • Digital Signature
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
99:26:BE:16:2A:D6:AC:6C:39:D6:DA:A3:C4:FB:1F:61:D6:64:22:5F:72:98:97:1C:37:34:3E:C5:E2:16:36:8A
SHA1
69:31:C8:28:49:6F:DD:8B:F1:E9:DB:08:B5:B6:1A:AF:93:37:E8:ED
X509v3 extensions
subjectKeyIdentifier
  • FA:C0:DC:43:28:8B:37:79:8F:34:5C:CC:73:38:1C:23:C6:77:59:63
authorityKeyIdentifier
  • keyid:9F:2B:5F:CF:3C:21:4F:9D:04:B7:ED:2B:2C:C4:C6:70:8B:D2:D7:0D
authorityInfoAccess
  • CA Issuers - URI:http://e5.i.lencr.org/
certificatePolicies
  • Policy: 2.23.140.1.2.1
crlDistributionPoints
  • Full Name:
  • URI:http://e5.c.lencr.org/78.crl
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 12:F1:4E:34:BD:53:72:4C:84:06:19:C3:8F:3F:7A:13:
  • F8:E7:B5:62:87:88:9C:6D:30:05:84:EB:E5:86:26:3A
  • Timestamp : Jul 10 09:38:22.741 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:20:43:3F:0C:09:E6:64:AD:D9:D0:44:06:0F:
  • 4D:10:66:1D:5E:CA:C8:03:7E:95:B2:05:1C:0A:E1:62:
  • 74:21:EC:34:02:21:00:87:6E:A5:83:2A:0B:84:CA:97:
  • 62:AE:C2:AF:84:49:0C:E2:45:8F:94:57:1F:87:C0:31:
  • 9B:87:4F:20:97:D0:AE
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 1A:04:FF:49:D0:54:1D:40:AF:F6:A0:C3:BF:F1:D8:C4:
  • 67:2F:4E:EC:EE:23:40:68:98:6B:17:40:2E:DC:89:7D
  • Timestamp : Jul 10 09:38:22.785 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:F5:42:46:BA:2F:B7:55:72:E3:90:0A:
  • DA:ED:D0:1D:F1:72:9B:61:74:9B:AE:93:14:E9:E6:2A:
  • C0:31:9B:87:F9:02:21:00:DA:C3:75:07:D3:24:E6:F1:
  • 6E:E1:27:9B:9F:D7:C4:B6:69:F0:8D:C7:A2:D1:E8:EB:
  • 91:AD:CE:85:B0:3E:96:EC