# Roadmap

## Vision
Create a robust, scalable, and user-friendly POP3 to Gmail forwarding solution that serves as a complete replacement for Gmail's discontinued POP3 import feature.

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## Current Status: MVP Complete ✅

The MVP includes:
- Multiple POP3 account support
- Gmail forwarding via SMTP
- Error notifications via Postmarkapp
- Docker deployment
- Rate limiting and throttling
- Comprehensive documentation

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## Short Term (Next 3 months)

### v1.1 - Enhanced Reliability
**Priority: High**

- [ ] **Persistent State Management**
  - SQLite database to track processed emails
  - Prevent duplicate forwarding
  - Resume after failures
  
- [ ] **Advanced Retry Logic**
  - Exponential backoff for failed forwards
  - Dead letter queue for repeatedly failed emails
  - Configurable retry attempts
  
- [ ] **Health Monitoring**
  - Health check endpoint for container orchestration
  - Prometheus metrics export
  - Status dashboard (simple web UI)
  
- [ ] **Enhanced Error Handling**
  - Categorize errors (transient vs permanent)
  - Different notification strategies per error type
  - Circuit breaker for failing POP3 accounts

### v1.2 - User Experience
**Priority: Medium**

- [ ] **Web Configuration UI**
  - Add/remove POP3 accounts without editing files
  - Test connections before saving
  - View forwarding statistics
  - Simple React/Vue.js frontend
  
- [ ] **Better Logging**
  - Structured JSON logging
  - Log rotation
  - Searchable log viewer
  - Export logs for analysis
  
- [ ] **Email Filtering**
  - Basic rules (sender, subject, size)
  - Whitelist/blacklist
  - Regular expression matching
  - Forward only matching emails

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## Medium Term (3-6 months)

### v2.0 - Advanced Features
**Priority: Medium**

- [ ] **Multiple Destinations**
  - Route different POP3 accounts to different Gmail addresses
  - CC/BCC support
  - Conditional routing based on rules
  
- [ ] **OAuth2 Support**
  - Gmail OAuth2 instead of App Passwords
  - More secure authentication
  - Better user experience
  
- [ ] **Attachment Handling**
  - Preserve attachments properly
  - Size limits
  - Virus scanning integration
  - Cloud storage integration (Google Drive)
  
- [ ] **Advanced Throttling**
  - Per-account rate limits
  - Time-of-day scheduling
  - Burst mode support
  - Gmail quota monitoring

### v2.1 - Email Management
**Priority: Low**

- [ ] **Email Archiving**
  - Optional local backup before forwarding
  - Export to mbox format
  - Search archived emails
  - Retention policies
  
- [ ] **HTML Email Support**
  - Preserve HTML formatting
  - Inline images
  - CSS processing
  
- [ ] **Email Threading**
  - Maintain conversation threads
  - In-Reply-To headers
  - References preservation

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## Long Term (6-12 months)

### v3.0 - Enterprise Features
**Priority: Low**

- [ ] **Multi-tenancy**
  - Support multiple users/teams
  - Per-user configuration
  - User management
  - API for integration
  
- [ ] **High Availability**
  - Kubernetes deployment manifests
  - Horizontal scaling
  - Leader election for distributed deployment
  - Failover support
  
- [ ] **Advanced Security**
  - Secrets management (Vault integration)
  - Encryption at rest
  - Audit logging
  - SSO/SAML support
  
- [ ] **Compliance**
  - GDPR compliance features
  - Email retention policies
  - Data export capabilities
  - Privacy controls

### v3.1 - Integration & Extensibility
**Priority: Low**

- [ ] **Webhook Support**
  - Notify external systems on events
  - Custom notification channels (Slack, Discord, Teams)
  - Integration with monitoring systems
  
- [ ] **Plugin System**
  - Custom email processors
  - Custom notification handlers
  - Custom storage backends
  
- [ ] **API**
  - RESTful API for all operations
  - Webhook configuration
  - Stats and metrics
  - Email search

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## Future Considerations

### Performance Optimizations
- Parallel processing of multiple POP3 accounts
- Connection pooling
- Caching layer
- Batch processing

### Additional Protocols
- IMAP support (not just POP3)
- Exchange/EWS support
- Microsoft Graph API
- Direct Gmail API integration

### Cloud Native Features
- Helm charts for Kubernetes
- Terraform modules
- Cloud provider integrations (AWS SES, SendGrid)
- Serverless deployment option (Lambda, Cloud Functions)

### Machine Learning
- Smart spam filtering
- Email categorization
- Priority detection
- Anomaly detection

### Mobile Support
- React Native mobile app
- Push notifications to mobile devices
- Mobile configuration
- On-the-go management

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## Community & Ecosystem

### Documentation
- [ ] Video tutorials
- [ ] Interactive setup wizard
- [ ] Migration guides from Gmail POP3 import
- [ ] Best practices guide
- [ ] Performance tuning guide

### Community
- [ ] Discord/Slack community
- [ ] Regular release schedule
- [ ] Contributor guidelines
- [ ] Code of conduct
- [ ] Security disclosure policy

### Compatibility
- [ ] Support for more email providers
- [ ] Test suite for major POP3 providers
- [ ] Compatibility matrix
- [ ] Provider-specific configurations

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## Release Schedule

- **v1.1**: +1 month (Enhanced Reliability)
- **v1.2**: +2 months (User Experience)
- **v2.0**: +3 months (Advanced Features)
- **v2.1**: +4 months (Email Management)
- **v3.0**: +6 months (Enterprise Features)
- **v3.1**: +9 months (Integration & Extensibility)

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## Contributing

We welcome contributions! Areas where help is needed:

1. **Testing**: Help test with different email providers
2. **Documentation**: Improve guides and tutorials
3. **Features**: Implement items from the roadmap
4. **Bug Fixes**: Fix issues as they arise
5. **Performance**: Optimize slow operations
6. **Security**: Security audits and improvements

See [CONTRIBUTING.md](CONTRIBUTING.md) for guidelines.

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## Feedback

This roadmap is a living document. We welcome feedback:

- Open an issue with suggestions
- Join discussions in GitHub Discussions
- Propose new features via pull requests
- Vote on existing feature requests

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## Decision Framework

Features are prioritized based on:

1. **User Impact**: How many users benefit?
2. **Complexity**: Development and maintenance effort
3. **Security**: Does it improve security?
4. **Reliability**: Does it improve reliability?
5. **Community Requests**: What are users asking for?

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*Last Updated: 2026-02-01*