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7/15/2026
The original title is: "I Built a Disposable Email Service on Cloudflare Workers + Upstash Redis. Here's the Architecture."

The original title is: "I Built a Disposable Email Service on Cloudflare Workers + Upstash Redis. Here's the Architecture."

Original: I Built a Disposable Email Service on Cloudflare Workers + Upstash Redis. Here's the Architecture.

Short summary

A developer explains the architecture behind VanishInbox, a free disposable email service built entirely on Cloudflare Workers and Upstash Redis. Inbound SMTP is caught by Cloudflare Email Routing, parsed by a Worker, and stored in Redis with a native 10-minute TTL so deletion is guaranteed without cron jobs. The post also covers bot mitigation using Turnstile, signed cookies, and rate limiting.

  • •Cloudflare Email Routing catches inbound SMTP and hands it to a Worker for MIME parsing
  • •Redis TTL of 10 minutes guarantees deletion without any scheduled job or cron dependency
  • •Bot abuse handled via Turnstile, signed cookies, and API rate limiting (20 req/10s triggers challenge)

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