This is a pentesting template for running security assessments against SMTP servers. It covers the standard attack surface: banner grabbing, user enumeration, open relay testing, brute force authentication, and misconfigurations. You get Claude prompts that walk through using nmap scripts, netcat for manual SMTP commands, and hydra for credential attacks. Two security audit tools flag it, which makes sense since it's literally pentesting code. Use this when you're doing authorized security testing on mail servers and want Claude to guide you through the methodology. It's practical if you know what you're doing, but don't run this against infrastructure you don't own.
npx skills add https://github.com/davila7/claude-code-templates --skill smtp-penetration-testing