: Proof-of-concept (PoC) tools like hMailEnum demonstrate how poorly obfuscated passwords in configuration files (like hMailServer.ini and hMailAdmin.exe.config ) can be easily decrypted and exfiltrated by local attackers.
Many exploits target the Windows COM API. Restrict DCOM permissions to only the NETWORK SERVICE account and your admin user. Disallow remote COM activation if not strictly needed. hmailserver exploit github