Monitor your mail logs for repeated failed AUTH attempts or relay tests, then block offending IPs automatically.
While specific documentation for version 2.5 is scarce on official channels, similar tools generally advertise: High-Speed Multi-threading Speed Smtp Scanner V2.5 Free Download
: Designed to capture your own credentials while you attempt to scan others. Backdoors : Giving attackers access to your system. Legitimate Alternatives Monitor your mail logs for repeated failed AUTH
Instead of risking your system's security with unverified downloads, consider using industry-standard, open-source tools that perform the same functions safely: consider using industry-standard