SSL-Tools

SSL check results of smtp.duckapp.pl

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Discover if the mail servers for smtp.duckapp.pl 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, 28 Apr 2024 12:19:56 +0000

The mailservers of smtp.duckapp.pl can be reached through a secure connection.

Servers

Incoming Mails

These servers are responsible for incoming mails to @smtp.duckapp.pl addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
smtp.duckapp.pl
192.109.241.221
 -
supported
poczta.duckapp.pl
DANE
missing
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 @smtp.duckapp.pl address so far. Test mail delivery

Certificates

First seen at:

CN=poczta.duckapp.pl

Certificate chain
  • poczta.duckapp.pl
    • remaining
    • 4096 bit
    • sha256WithRSAEncryption
      • R3
        • remaining
        • 2048 bit
        • sha256WithRSAEncryption
          • ISRG Root X1 (Certificate is self-signed.)
            • remaining
            • 4096 bit
            • sha256WithRSAEncryption
Subject
Common Name (CN)
  • poczta.duckapp.pl
Alternative Names
  • imap.duckapp.pl
  • mx2.duckapp.pl
  • poczta.duckapp.pl
  • smtp.duckapp.pl
  • www.poczta.duckapp.pl
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • R3
validity period
Not valid before
2024-04-26
Not valid after
2024-07-25
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
85:34:6C:E9:A7:6E:75:80:95:0D:87:E6:6B:69:31:9A:61:A9:18:DC:22:65:E5:C7:D1:60:5C:FA:3D:64:5D:34
SHA1
9E:61:C0:BB:32:74:D3:63:A9:E4:5B:C0:C5:37:4D:1C:2C:D5:3A:70
X509v3 extensions
subjectKeyIdentifier
  • 84:5D:7B:99:34:65:55:DD:A9:EC:5B:17:C6:A5:5E:2D:78:8C:70:AD
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 : 3F:17:4B:4F:D7:22:47:58:94:1D:65:1C:84:BE:0D:12:
  • ED:90:37:7F:1F:85:6A:EB:C1:BF:28:85:EC:F8:64:6E
  • Timestamp : Apr 26 12:18:33.375 2024 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:44:02:20:5F:9A:1F:32:66:93:9C:6F:59:12:AF:EF:
  • E3:E4:46:A9:8C:AB:23:4A:6D:0E:9A:80:C6:76:E4:43:
  • C5:47:BD:73:02:20:1F:1D:7B:C1:2E:C9:66:AB:8B:1B:
  • 71:64:69:56:29:0F:D6:AF:CB:E3:FC:1C:54:91:13:70:
  • EC:98:DD:53:38:F1
  • 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 : Apr 26 12:18:34.153 2024 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:AD:58:41:45:2B:63:0F:33:90:78:B3:
  • 8A:2D:32:85:ED:DF:EE:98:B4:83:04:C3:BE:37:C7:47:
  • DF:68:C3:89:DC:02:20:16:13:AA:9E:B4:C7:41:E7:ED:
  • EA:A5:DD:FD:A6:29:19:CA:25:D4:06:C2:BC:1C:55:9A:
  • 3B:60:52:07:F3:A8:F0