SSL check results of redback-spider.net

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Discover if the mail servers for redback-spider.net 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 Thu, 06 May 2021 08:29:45 +0000

We can not guarantee a secure connection to the mailservers of redback-spider.net!

Please contact the operator of redback-spider.net and ask him or her to solve this problem. This result stays accessible under the following address:

/mailservers/redback-spider.net

Servers

Incoming Mails

These servers are responsible for incoming mails to @redback-spider.net addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
mail.redback-spider.net
2a01:488:66:1000:b01c:8d1::1
Results incomplete
10 not checked
DANE
missing
PFS
not checked
Heartbleed
not checked
Weak ciphers
not checked
11 s
mail.redback-spider.net
176.28.8.209
10
supported
redback-spider.net
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
supported
  • ECDHE_RSA_WITH_RC4_128_SHA
  • SSL_RSA_WITH_RC4_128_SHA
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
12 s

Outgoing Mails

We have not received any emails from a @redback-spider.net address so far. Test mail delivery

Certificates

First seen at:

CN=redback-spider.net

Certificate chain
  • redback-spider.net
    • remaining
    • 4096 bit
    • sha256WithRSAEncryption
    • Hostname Mismatch
    • Unknown Authority

      R3
Subject
Common Name (CN)
  • redback-spider.net
Alternative Names
  • conference.redback-spider.net
  • redback-spider.net
  • secure.redback-spider.net
  • svn.redback-spider.net
  • www.redback-spider.net
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • R3
validity period
Not valid before
2021-05-01
Not valid after
2021-07-30
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
8A:8D:7B:A2:D7:07:5C:F8:88:5E:E7:9E:AD:C9:AD:53:62:62:8F:D9:36:E2:E8:28:B1:51:78:8F:28:DB:AD:06
SHA1
EF:2F:2F:46:7D:27:9B:1A:44:FA:6A:6B:6A:A4:F9:F9:B1:74:50:DF
X509v3 extensions
subjectKeyIdentifier
  • 13:FF:93:AE:66:2F:34:20:95:C5:35:D7:BF:87:C9:6F:87:3F:17:15
authorityKeyIdentifier
  • keyid:14:2E:B3:17:B7:58:56:CB:AE:50:09:40:E6:1F:AF:9D:8B:14:C2:C6
authorityInfoAccess
  • OCSP - URI:http://r3.o.lencr.org
  • CA Issuers - URI:http://r3.i.lencr.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 : 6F:53:76:AC:31:F0:31:19:D8:99:00:A4:51:15:FF:77:
  • 15:1C:11:D9:02:C1:00:29:06:8D:B2:08:9A:37:D9:13
  • Timestamp : May 1 20:50:13.358 2021 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:83:99:16:29:AE:A7:AC:D0:5D:74:13:
  • F3:D9:EA:DB:AD:AC:AC:C8:F5:86:29:9E:32:9E:18:DC:
  • 75:25:2C:39:00:02:21:00:A4:11:D4:D2:67:BE:18:BF:
  • C3:56:F9:4D:1F:8C:7F:7F:25:50:4F:4F:12:4A:7E:7D:
  • BE:76:AB:36:7B:A0:87:11
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : F6:5C:94:2F:D1:77:30:22:14:54:18:08:30:94:56:8E:
  • E3:4D:13:19:33:BF:DF:0C:2F:20:0B:CC:4E:F1:64:E3
  • Timestamp : May 1 20:50:13.314 2021 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:CB:5A:D8:C9:90:B0:82:73:4D:1D:49:
  • F6:3E:7D:D3:0E:70:0B:FE:A7:D4:05:C9:83:BC:56:21:
  • 9D:42:49:B6:EF:02:21:00:AF:04:18:B5:55:63:8F:DA:
  • 27:20:EF:17:D1:F5:75:F1:9B:E1:B6:38:75:E3:A8:7C:
  • 67:26:FC:6F:E2:F5:AE:DC