Mailpit

Mailpit is a lightweight, multi-platform email testing tool for developers. It runs an SMTP server that captures all outgoing emails and displays them in a clean web interface with a powerful API.

What You Can Do After Deployment

1. Access the web UI to view all captured emails in real time
2. Configure your application to send emails via Mailpit SMTP on port 1025
3. Search, filter, and inspect email content including HTML, plain text, and attachments
4. Use the REST API to integrate email testing into your CI/CD pipeline
5. Test email rendering across different clients with the built-in preview

Key Features

• Zero-dependency SMTP server with instant email capture
• Modern web UI with real-time updates via WebSocket
• REST API for programmatic access and automation
• Support for MIME, attachments, HTML emails, and message tagging
• Lightweight with very low memory footprint

License

MIT — GitHub