Hscan was not exclusively an SMTP scanner; it was a modular auditing tool. Its capabilities typically included:

: Using a scanner against networks you do not own or have explicit permission to test is illegal in many jurisdictions and can result in your IP being blacklisted or legal action from service providers. Modern Alternatives

If your objective is to audit your organization's mail servers or conduct authorized penetration testing, modern network security tools provide vastly superior, safer, and more comprehensive capabilities than Hscan 1.2. 1. Nmap (Network Mapper)