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In a professional context, such tools are used for to emulate real-world cyberattacks and assess an organization's defense against unauthorized email access.

: Designed with a high-performance architecture to allow massive processing of credential lists simultaneously.

What SMTP port should be used? Port 25, 587, or 465? - Cloudflare

While specific implementations vary, tools of this type usually include the following advanced or "deep" features:

: Often supports both standard SMTP and secure SMTPS (using TLS/SSL) to test a wide range of mail server configurations.

: Includes logic to identify and log successful "hits" into categorized files, often including details like the server response code or supported authentication methods. Usage in Security