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EmailEngine

EmailEngine is a self-hosted email gateway that allows you to access email accounts over REST API. It provides a unified interface to interact with IMAP and SMTP protocols, as well as native integrations with Gmail API and Microsoft Graph API.

What is EmailEngine?​

EmailEngine streamlines email integration for your app or service with a unified REST API that seamlessly connects with:

  • IMAP - Standard email protocol
  • SMTP - Standard email sending protocol
  • Gmail API - Native Gmail integration
  • Microsoft Graph API - Native Microsoft 365/Outlook integration

Key Features​

Unified REST API​

Access all email accounts through a single, consistent REST API regardless of the underlying protocol (IMAP, Gmail API, or Microsoft Graph).

Real-time Webhooks​

Receive instant notifications about new emails, email updates, and account changes through webhooks.

OAuth2 Support​

Built-in support for OAuth2 authentication for Gmail, Google Workspace, Microsoft 365, and Outlook.com accounts.

Email Sending​

Send emails through SMTP or native APIs with support for attachments, HTML content, and templates.

Account Management​

Register and manage multiple email accounts with automatic connection handling and reconnection.

Message Management​

  • List, search, and filter messages
  • Mark messages as read/unread
  • Move messages between folders
  • Delete messages
  • Download attachments

Self-hosted​

Run EmailEngine on your own infrastructure for complete control over your email data and privacy.

Use Cases​

  • Email Integration - Add email functionality to your SaaS application
  • Email Automation - Automate email workflows and responses
  • Customer Support - Integrate customer email communications into your CRM
  • Email Analytics - Track and analyze email communications
  • Email Backup - Create backups of email accounts

Quick Start​

Get started with EmailEngine in just a few steps:

  1. Install EmailEngine - Download and set up EmailEngine on your server
  2. Configure Redis - Set up Redis for data storage
  3. Register an Account - Add your first email account via API
  4. Set up Webhooks - Configure webhooks to receive notifications
  5. Start Building - Explore the API reference and build your integration

System Requirements​

  • Redis Any version (or Redis-compatible service like Upstash)
  • Memory Minimum 4GB RAM for development, 8GB+ for production (16GB+ recommended for larger deployments)
  • OS Linux, macOS, or Windows

License​

EmailEngine includes a 14-day free trial with full functionality and no limitations. No credit card required - just click "Activate Trial" in the dashboard to begin.

For production use, get a license key from postalsys.com.