SSL-Tools

SSL check results of ostrowski.be

NEW You can also bulk check multiple servers.

Discover if the mail servers for ostrowski.be 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 Thu, 30 Oct 2025 01:30:11 +0000

The mailservers of ostrowski.be can be reached through a secure connection.

Servers

Incoming Mails

These servers are responsible for incoming mails to @ostrowski.be addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
webmail.ostrowski.be
2a01:4f8:242:4bc2::2
 10
supported
ostrowski.be
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
1 s
webmail.ostrowski.be
168.119.0.253
 10
supported
ostrowski.be
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 @ostrowski.be address so far. Test mail delivery

Certificates

First seen at:

CN=ostrowski.be

Certificate chain
  • ostrowski.be
    • remaining
    • 2048 bit
    • sha256WithRSAEncryption
      • R12
        • remaining
        • 2048 bit
        • sha256WithRSAEncryption
          • ISRG Root X1 (Certificate is self-signed.)
            • remaining
            • 4096 bit
            • sha256WithRSAEncryption
Subject
Common Name (CN)
  • ostrowski.be
Alternative Names
  • *.ostrowski.be
  • ostrowski.be
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • R12
validity period
Not valid before
2025-10-29
Not valid after
2026-01-27
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
10:4B:D4:A6:D9:62:B9:76:74:9C:20:63:3A:22:E6:3E:A7:3C:90:9B:43:09:98:49:93:E6:2A:AD:BA:FF:37:15
SHA1
74:18:D1:30:73:97:65:52:63:14:D8:0D:54:6F:F7:DB:C6:21:87:3E
X509v3 extensions
subjectKeyIdentifier
  • 0F:78:72:09:EC:CE:2A:95:C3:2D:94:C0:6F:4F:99:89:89:05:CC:00
authorityKeyIdentifier
  • keyid:00:B5:29:F2:2D:8E:6F:31:E8:9B:4C:AD:78:3E:FA:DC:E9:0C:D1:D2
authorityInfoAccess
  • CA Issuers - URI:http://r12.i.lencr.org/
certificatePolicies
  • Policy: 2.23.140.1.2.1
crlDistributionPoints
  • Full Name:
  • URI:http://r12.c.lencr.org/87.crl
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 49:9C:9B:69:DE:1D:7C:EC:FC:36:DE:CD:87:64:A6:B8:
  • 5B:AF:0A:87:80:19:D1:55:52:FB:E9:EB:29:DD:F8:C3
  • Timestamp : Oct 29 12:28:40.585 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:F2:5D:B9:D0:DD:71:D8:42:A6:99:18:
  • 40:AF:6F:4F:B5:EC:E6:63:41:77:7D:62:28:BC:80:C6:
  • BE:2E:87:93:DC:02:20:1C:A7:3F:B4:BA:AA:25:DE:50:
  • FD:C8:5A:AD:52:C0:55:AC:6B:9E:80:8F:5E:7D:5D:89:
  • D6:A6:8B:93:48:8F:DA
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 0E:57:94:BC:F3:AE:A9:3E:33:1B:2C:99:07:B3:F7:90:
  • DF:9B:C2:3D:71:32:25:DD:21:A9:25:AC:61:C5:4E:21
  • Timestamp : Oct 29 12:28:40.605 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:20:09:2C:4B:B2:4F:22:AD:72:7B:D5:A3:73:
  • 7A:DB:AC:67:3F:6C:18:00:58:F7:C7:F2:CE:F1:D4:19:
  • CD:99:9D:92:02:21:00:BA:85:91:17:0F:7B:CF:24:85:
  • 0D:73:36:76:F8:BD:77:72:0D:C4:AB:E4:92:C4:E0:0C:
  • A0:01:C7:7B:AA:9D:65