Blog
Practical guides on blocking disposable emails and stopping fake signups.
How to block disposable emails in Next.js
A step-by-step guide to rejecting disposable and temporary email addresses in a Next.js signup flow — Server Actions, Route Handlers, and middleware.
May 19, 2026 · 7 min readDetect temporary email addresses in Node.js
How to catch throwaway email addresses in any Node.js backend — Express, Fastify, NestJS — with an offline, zero-dependency check.
May 19, 2026 · 6 min readFree disposable email API: the open-source option
Most disposable email APIs bill per request. Here's how to validate emails for free with an open-source package, and when a hosted API is still worth it.
May 19, 2026 · 6 min readHow to detect disposable emails in Python
Catch throwaway and temporary email addresses in any Python app — Django, Flask, FastAPI — with an offline, zero-dependency check.
May 16, 2026 · 6 min readHow to block disposable emails in Supabase Auth
Reject disposable and temporary email signups in Supabase using an Auth Hook or an Edge Function — before the user account is ever created.
May 14, 2026 · 7 min readHow to stop fake signups (without annoying real users)
Fake and disposable-email signups inflate your metrics and waste your time. Here's a practical layered defense that doesn't add friction for real users.
May 13, 2026 · 8 min readWhat is a disposable email address?
Disposable email addresses are temporary inboxes that expire in minutes. Here's how they work, why people use them, and what they mean for your product.
May 12, 2026 · 5 min read