SSL-Tools

SSL check results of mail.ceramika-serwis.pl

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Discover if the mail servers for mail.ceramika-serwis.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

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Report created Sun, 26 Apr 2026 00:30:23 +0000

The mailservers of mail.ceramika-serwis.pl can be reached through a secure connection.

Servers

Incoming Mails

These servers are responsible for incoming mails to @mail.ceramika-serwis.pl addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
mail.ceramika-serwis.pl
81.219.64.86
 -
supported
mail.ceramika-serwis.pl
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
3 s

Outgoing Mails

We have not received any emails from a @mail.ceramika-serwis.pl address so far. Test mail delivery

Certificates

First seen at:

CN=mail.ceramika-serwis.pl

Certificate chain
  • mail.ceramika-serwis.pl
    • remaining
    • 2048 bit
    • sha256WithRSAEncryption
      • R13
        • remaining
        • 2048 bit
        • sha256WithRSAEncryption
          • ISRG Root X1 (Certificate is self-signed.)
            • remaining
            • 4096 bit
            • sha256WithRSAEncryption
Subject
Common Name (CN)
  • mail.ceramika-serwis.pl
Alternative Names
  • mail.ceramika-serwis.pl
  • mta-sts.ceramika-serwis.pl
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • R13
validity period
Not valid before
2026-04-03
Not valid after
2026-07-02
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
Fingerprints
SHA256
17:1C:5B:EB:C1:7A:41:D5:0F:7E:1F:AE:D9:54:85:F8:22:F3:C0:B5:E5:14:85:A4:9B:AC:E2:9E:DB:69:34:35
SHA1
F3:A1:F6:69:F8:C6:B8:CE:4A:CD:03:3B:21:2D:70:9D:6E:1A:AD:F3
X509v3 extensions
subjectKeyIdentifier
  • A1:53:24:9E:B4:89:F9:F2:6B:66:B9:AC:84:F0:81:80:4C:8C:11:F0
authorityKeyIdentifier
  • keyid:E7:AB:9F:0F:2C:33:A0:53:D3:5E:4F:78:C8:B2:84:0E:3B:D6:92:33
authorityInfoAccess
  • CA Issuers - URI:http://r13.i.lencr.org/
certificatePolicies
  • Policy: 2.23.140.1.2.1
crlDistributionPoints
  • Full Name:
  • URI:http://r13.c.lencr.org/40.crl
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : C2:31:7E:57:45:19:A3:45:EE:7F:38:DE:B2:90:41:EB:
  • C7:C2:21:5A:22:BF:7F:D5:B5:AD:76:9A:D9:0E:52:CD
  • Timestamp : Apr 3 22:00:47.472 2026 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:20:0A:CB:C0:FB:8E:24:32:08:D0:8A:86:57:
  • D2:F5:8C:FC:AF:A0:C0:E7:06:6E:C4:C1:69:A9:5B:CD:
  • 58:21:24:B9:02:21:00:C3:5F:26:75:B0:B6:47:81:C8:
  • 2D:DC:E9:37:16:D4:40:71:E1:48:9B:C9:E8:95:E8:FA:
  • 5E:70:49:96:B0:FA:92
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 1A:8B:9D:6B:0F:FE:BF:81:B4:79:39:C6:D2:31:0A:86:
  • D6:D1:02:D4:F0:46:E2:18:2C:9D:E3:5F:5E:26:25:EF
  • Timestamp : Apr 3 22:00:47.700 2026 GMT
  • Extensions: 00:00:05:00:06:8B:02:F0
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:92:F9:EA:75:23:F2:D5:84:4B:E0:5B:
  • 9A:06:E9:60:CB:65:B6:B6:83:34:7B:08:76:B6:68:2C:
  • 93:0B:24:9C:F0:02:21:00:94:C1:EA:11:D1:A1:24:D1:
  • D0:E7:37:20:AF:A7:52:F2:B9:75:56:68:C5:AF:E5:CD:
  • D7:C9:76:23:60:6C:17:BA