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Show HN: IsDisposable – Open-source disposable email detection (160K+ domains)
- junaidshaukat 6mo agoHi HN, I built this to solve the fake signup problem in SaaS apps. About 23% of signups use disposable emails from services like Guerrilla Mail and 10MinuteMail. Each costs ~$0.50 in compute and AI credits. The npm package works fully offline with 160K+ domains in a Set (O(1) lookup, <1ms). The API adds DNS/MX fingerprinting — even when disposable services rotate domains, their mail servers stay the same, so you can catch new ones before any list updates. Risk scoring 0-100 using domain age, MX self-referencing patterns, and behavioral signals. CS student from Pakistan. First real open-source project. Would love feedback on the detection approach. Source: https://github.com/isdisposable/js https://github.com/isdisposable/js Docs: https://isdisposable.com/docs https://isdisposable.com/docs
- doc_ick 6mo agoI wish I could downvote this multiple times.
- zekejohn 6mo agoong bruh