SSL-Tools

SSL check results of sierra-dev.de

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Discover if the mail servers for sierra-dev.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 Sat, 27 Jul 2024 00:30:54 +0000

The mailservers of sierra-dev.de can be reached through a secure connection.

Servers

Incoming Mails

These servers are responsible for incoming mails to @sierra-dev.de addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
mail.lstahl.de
2001:41d0:700:10a0::3
 10
supported
*.lstahl.de
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
9 s
mail.lstahl.de
135.125.210.240
 10
supported
*.lstahl.de
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
5 s

Outgoing Mails

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

Certificates

First seen at:

CN=*.lstahl.de

Certificate chain
  • *.lstahl.de
    • remaining
    • 2048 bit
    • sha256WithRSAEncryption
      • R3
        • remaining
        • 2048 bit
        • sha256WithRSAEncryption
          • ISRG Root X1 (Certificate is self-signed.)
            • remaining
            • 4096 bit
            • sha256WithRSAEncryption
Subject
Common Name (CN)
  • *.lstahl.de
Alternative Names
  • *.lstahl.de
  • lstahl.de
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • R3
validity period
Not valid before
2024-05-31
Not valid after
2024-08-29
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
0D:48:29:21:89:37:B1:B1:CF:A2:44:B4:7A:FE:FB:AC:E9:65:76:44:3A:06:0C:76:BF:67:EA:5B:3A:F4:3F:2C
SHA1
2F:A8:7B:6A:6B:87:A0:CB:E8:61:0E:95:98:35:6E:04:E7:19:78:A0
X509v3 extensions
subjectKeyIdentifier
  • 7B:4B:D2:64:D7:4C:75:1E:44:9F:28:D8:F5:3D:2D:3B:CD:8C:92:AA
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
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : EE:CD:D0:64:D5:DB:1A:CE:C5:5C:B7:9D:B4:CD:13:A2:
  • 32:87:46:7C:BC:EC:DE:C3:51:48:59:46:71:1F:B5:9B
  • Timestamp : May 31 18:56:18.409 2024 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:BC:86:75:46:C1:7A:AC:42:9A:9B:9B:
  • 58:41:AF:EA:28:F3:D1:EF:DC:4A:2F:14:90:18:30:45:
  • 24:89:21:A5:27:02:21:00:F6:D1:F9:71:B3:7B:04:FB:
  • 74:BD:82:78:51:3F:C6:54:71:27:F3:7B:4D:DC:76:5D:
  • CF:3E:D6:D7:AE:42:AB:EA
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 48:B0:E3:6B:DA:A6:47:34:0F:E5:6A:02:FA:9D:30:EB:
  • 1C:52:01:CB:56:DD:2C:81:D9:BB:BF:AB:39:D8:84:73
  • Timestamp : May 31 18:56:19.232 2024 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:8A:10:B0:7A:90:3B:6C:5A:0A:EA:14:
  • BA:28:12:9C:9C:35:0C:78:FE:CC:89:04:D2:28:0B:9C:
  • E9:A6:3B:13:C4:02:21:00:BF:F4:DD:75:0B:7C:6E:26:
  • 58:C4:95:27:BA:F2:A8:C5:DE:EB:F5:47:76:BD:14:FC:
  • 49:C9:CD:85:5E:09:22:0B