Show HN: Tempmail3 – Instant disposable email service, zero signup, open-source

I built *Tempmail3*—a lightweight, disposable email service that works instantly and requires *no signup or verification*.

*Why I built this* I often needed quick email addresses for testing or sign-ups—but existing services were slow, cluttered, or required entering my real email. So I built Tempmail3 to be as fast and frictionless as possible.

*What it does* - Generate a temporary email with one click. - View incoming emails in real time via the browser. - Discard or regenerate the address anytime. - (Optional) This is an open-source project: [GitHub link].

*Technical details & challenges* - Back-end is in Go, using in-memory store for emails to guarantee speed. - Email retrieval via WebSocket for live updates. - Rate-limiting to prevent abuse, while keeping user experience seamless. - Lightweight CSS/UI for ultra-fast load times.

*Differences from other services* - No ads, trackers, or cluttered UI. - Minimalistic, lightning-fast UX. - Open-source and privacy-focused—no logs retained more than 1 hour. - Hosted on low-tier infrastructure—demonstrates that even with limited resources, it stays responsive.

I’d love feedback on: - UX or UI improvements—what would make me use this everyday? - Abuse prevention—any suggestions for better rate-limiting or abuse mitigation? - Feature ideas—e.g. custom domains, API, etc.

Happy to walk through any part of the design or code if anyone is curious!