Inbucket

An email testing service that accepts messages for any address and makes them available through a web interface, REST API, and POP3. Think of it as a self-hosted Mailinator for your development and QA workflows. No database required.

What You Can Do After Deployment

1. Open your domain — the inbox list loads immediately, no login needed
2. Send test emails — point your application's SMTP to this service on port 2500
3. View messages — browse received emails in the web UI with full HTML rendering
4. Inspect headers — examine raw email headers, MIME parts, and attachments
5. Use the REST API — integrate email verification into your CI/CD pipeline
6. Connect via POP3 — use any email client to retrieve test messages on port 1100

Key Features

• Accepts email for any address — no mailbox configuration needed
• Built-in SMTP server (port 2500), POP3 server (port 1100), and web UI (port 9000)
• Full HTML email rendering in the browser
• REST API for programmatic access
• No database — messages stored in memory or flat files
• Lightweight single binary written in Go
• Configurable message retention and storage limits

License

MIT — GitHub