Welcome to Koltrix
Koltrix is email infrastructure for the modern era: a single platform that gives you a real inbox, full newsletter management, transactional sending APIs, SMTP relay, and a complete dashboard — all in one place, optionally self-hosted.
What you can do
- Send transactional email through a REST API or SMTP relay, with bounce tracking, opens, clicks, idempotency, and webhooks.
- Run newsletters with lists, subscribers, segments, double opt-in, drip sequences, and A/B test winners.
- Use a real inbox for your team — receive, reply, AI-summarise, and route email across multiple domains and organisations.
- Operate as a multi-tenant SaaS with proper org switching, role-based permissions, and a per-tenant warmup schedule that protects deliverability.
- Self-host the whole thing with one Docker Compose stack and a single installer script.
Pick a path
| If you want to… | Go to |
|---|---|
| Send your first email in 60 seconds | Quickstart |
| Understand how the pieces fit | Architecture |
| Authenticate to the API | Authentication |
| Set up newsletters & lists | Newsletters |
| Receive delivery events | Webhooks |
| Deploy on your own server | Deployment |
| Read every endpoint | API reference |
Need help?
Open an issue at github.com/koltrix or email [email protected].