EmailServer
Self-Hosted Enterprise Email Infrastructure
A production-ready, Docker-based email infrastructure providing SMTP/IMAP services with advanced spam filtering, DKIM/SPF/DMARC authentication, and full administrative control.
// the problem
Challenge
Modern businesses need email infrastructure that balances deliverability, security, and control. Cloud email services lack customization and data sovereignty. Building reliable email infrastructure requires expertise in MTA configuration, DNS authentication, spam filtering, and security hardening—a complex stack that must work flawlessly.
// what we built
Solution
EmailServer packages battle-tested components into a cohesive, Docker-orchestrated system. The SMTP layer handles queue management and rate limiting, while the IMAP/POP3 service provides efficient mailbox storage. Intelligent spam filtering with adaptive learning blocks threats, while full email authentication ensures deliverability. A Node.js admin API enables programmatic management.
// shipped
Key features
- SMTP/IMAP/POP3 with TLS 1.3
- Adaptive spam filtering with auto-learning
- DKIM signing and SPF/DMARC validation
- Roundcube webmail interface
- Admin API for automation
- Multi-domain support
- Automated backup and restore
- Rate limiting and greylisting
// stack.json
Tech stack
The exact tools shipping this product in production.
- Docker
- Redis
- Node.js
- Traefik
- SMTP/IMAP
- Email Authentication
// system.diagram()
Architecture
Docker-orchestrated email stack with authentication, filtering, and management API
- backend
- ai
- cache
- frontend
- database
// receipts
Results
- Complete Docker Compose deployment
- Production-grade SMTP, IMAP, and spam filtering stack
- DKIM/SPF/DMARC authentication built-in
- Roundcube webmail with 2FA support
- REST API for domain and user management
- Automated SSL via Let's Encrypt
// next()
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