Meeting information security standards and government regulations.
smtp-enum-users.nse : Attempts to enumerate usernames through legacy SMTP commands.
Metasploit contains dedicated auxiliary modules designed specifically for information gathering and configuration auditing on mail servers. The auxiliary/scanner/smtp/smtp_version and smtp_enum modules provide robust testing capabilities within a controlled environment. 3. Online Configuration Validators
For administrators verifying their own domain infrastructure, web-based tools provide safe, non-intrusive checking mechanisms. Services like MXToolbox or Internet.nl analyze mail server banners, check for open relays, and verify that SPF, DKIM, and DMARC records are correctly aligned. Securing Modern SMTP Environments
There is no official or widely recognized academic "proper paper" dedicated specifically to a tool named Smtp Scanner Hscan 1.2
If your goal is to scan SMTP servers for vulnerabilities, do not rely on Hscan 1.2. Instead, use actively maintained, open-source tools available from official repositories.
: As of early 2026, the software has moved well beyond version 1.2. Recent updates include Version 2.3 (July 2025) and Update 3.2.2
Understanding SMTP Scanners and Hscan 1.2: Security Risks and Practical Insights