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The original was posted on /r/selfhosted by /u/Consistent_Equal5327 on 2025-04-26 19:29:22+00:00.

I got tired of paying for tools like Clearbit or Hunter that just guess email patterns. So I built a Rust CLI tool that does email discovery and verification locally, no API, no tracking, no hosted service.

What it does (self-hosted style):

• You run it locally or on your own VPS
• Input: a full name + a company domain
• It:
  • Generates common patterns (j.doe@corp.com, etc.)
  • Scrapes the company’s website for any emails
  • Resolves MX records
  • Connects to the mail server (SMTP) and sends RCPT TO to check if the email exists
• Outputs full JSON results with logs, confidence scores, etc.

This shouldn’t require an API key and a SaaS subscription. It’s your terminal, your data, and your infra.

No rate limits. No vendor lock-in. Just a binary you control.

MIT-licensed, open-source, no telemetry, JSON in/out. Built it for myself as a founder, but figured others doing cold outreach, recruiting, or OSINT might find it handy too.

Happy to answer questions or improve it based on feedback.