Mail server
Open sourceBoxMTA
An open-source mail server you control.
BoxMTA is an open-source mail server you run on your own infrastructure — send and receive email with full control over routing, deliverability and logs, and the source in the open.
View source on GitHubOverview
Your mail, your servers, your rules.
Email infrastructure is one of the last things worth keeping in your own hands when deliverability and control matter. BoxMTA is an open-source mail server you run yourself — a complete system for sending and receiving mail, with the source in the open so nothing is hidden.
It handles the parts that make email hard: SPF, DKIM and DMARC alignment, smart retries, reputation, bounce and complaint tracking, and webhooks for every event. Connect over SMTP or the HTTP API, route per domain, and see it all in detailed logs.
Because it's open source and self-hosted, your IPs, your data and your routing stay with you — read the code, adapt it, and scale it on your own terms.
Features
What's inside
Open source
The full source is on GitHub. Read it, run it and adapt it to your setup — no black boxes and no lock-in.
Send and receive
A complete mail server for outbound and inbound email, with SMTP and an HTTP API to plug into your apps.
Deliverability built in
SPF, DKIM and DMARC alignment, smart retries and reputation handling so more of your mail reaches the inbox.
Own your infrastructure
Self-host on your own servers and keep full control of your IPs, data and routing rules.
Full visibility
Detailed delivery logs, bounce and complaint tracking, and webhooks for every event in the pipeline.
Built to scale
A queue-based core that handles bursts of transactional mail and large campaigns without breaking a sweat.
At a glance
- License
- Open source
- Source
- github.com/iiniit
- Interfaces
- SMTP & HTTP API
- Hosting
- Self-hosted
- Auth
- SPF · DKIM · DMARC
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