Show HN: Free Email Verification Tool – no signup required

Category: devtools

Tags: email-verification, smtp, web-service

Score: 3.0/10 (Innovation: 2, Technical: 3, Documentation: 5, Utility: 4)

SMTP Probe is a free, web-based email verification tool that uses SMTP protocol to check mailbox existence without sending messages. It offers 100 free verifications per day with no signup, and claims an open-source verification engine, though the repository link is missing. The project is essentially a hosted service with privacy-focused documentation, but it lacks technical depth or novel features.

Target audience: backend developers, marketers, email infrastructure engineers

Repository: https://probe.uspeedo.online/

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