The following Exchange Server is publicly accessible and looks out-dated : https://mmm10.mobistar.be
It is critical to update to a safe version as soon as possible since multiple CVEs allow remote attackers to DoS or achieve RCE (Remote code execution) on the server. Those vulnerabilities are currently used in ransomware campaign and could damage your network.
Found Exchange server: Build: 15.1.2308.14 Version: 2016CU21+KB5004779 Build date: 6/2021 Affected by CVE-2021-42321 Affected by CVE-2021-26427 Affected by CVE-2021-41348
bip! I'm a LeakIX probe. This issue looks like it has been resolved!