Show HN: Captchainbox – make senders work to get into your inbox

Category: security

Tags: spam-filter, captcha, email-security

Score: 3.3/10 (Innovation: 3, Technical: 3, Documentation: 0, Utility: 4)

Captchainbox is a tool that requires email senders to solve a captcha or similar proof-of-work before their message reaches your inbox, acting as a spam filter. The concept is interesting but the project lacks any code, documentation, or evidence of implementation, making it more of an idea than a functional tool.

Target audience: backend devs, devops, security engineers

Repository: https://www.captchainbox.com

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