# Rapid Inbox

> Rapid Inbox is a self-hosted, open-source inbound SMTP inbox for email testing and CI/E2E workflows. Uses C++ engine with local SQLite storage.

- **Category:** Email
- **Licence:** MIT
- **Latest version:** v0.1.0
- **Open source:** oss
- **Languages:** Python, HTML, C++
- **Platforms:** Docker Compose, Systemd
- **Tags:** SQLite, Automation, SMTP, Mail Server, Cpp, Developer Tools, Docker, Fastapi, Self Hosted, Email Server, Email testing, Ci Cd, Inbound Email, Verification Codes, Cpp20

## Description

Rapid Inbox is a self-hosted inbound email system built for developers and test teams who need to receive and inspect emails locally without relying on external email services. It features a C++ SMTP ingestion engine that provides durable acknowledgments, byte-level backpressure, and multi-worker MIME parsing. Messages, attachments, and metadata are stored on the local filesystem and in SQLite. The system supports managed domains and catch-all modes, public and private inboxes, verification code extraction in multiple languages, role-based access control with three admin roles, and API keys with fine-grained scopes. Deployment options include Docker Compose as the primary method and native systemd on Debian/Ubuntu as a secondary option. The admin console provides a web UI for managing domains, mailboxes, and messages, while HTTP APIs (v1 and v2) enable programmatic access. The project is in alpha (0.x) with explicit non-goals including outbound SMTP, IMAP/POP3, multi-node HA, and advanced anti-spam.

## Links

- [Homepage](https://github.com/wendaochangsheng/rapid-inbox)
- [Website](https://mail.acvenor.com)
- [GitHub Repository](https://github.com/wendaochangsheng/Rapid-Inbox)
- [Releases](https://github.com/wendaochangsheng/Rapid-Inbox/releases)

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Source: https://selfhost.directory/project/rapid-inbox