ulaknode - Your email. Your server. Your rules.
ulaknode is a free, self-hosted business email server for Linux, packaged as a single Docker deployment. Run it on your own infrastructure, keep control of your data, and get optional commercial support from itefix.net when you need help with setup, migration, maintenance, or troubleshooting.
What’s included
ulaknode bundles a complete production-ready mail stack in a single deployment:
- Postfix handles SMTP mail transfer functions
- Dovecot provides IMAP access for various clients
- OpenDKIM and OpenDMARC sign, verify, and enforce DKIM/DMARC
- policyd-spf checks SPF
- Postgrey greylists unfamiliar senders, cutting off most bot-driven spam before it's even scored
- SpamAssassin performs content-based spam scoring
- ClamAV scans incoming messages for malware
- Postscreen blocks DNSBL-listed senders before a full SMTP session even starts, backed by Unbound, a resolver dedicated to just this mail server
- Fail2ban bans brute-force SMTP and IMAP clients at the application layer
Open-source and self-hosted
ulaknode is designed for organisations that want to run their own mail infrastructure without building a complete mail stack from scratch.
- Deploy it on your own VPS, dedicated server, private cloud, or on-premises hardware
- Keep your email data under your control
- Avoid per-user and per-mailbox subscription costs
- Use it freely under a BSD-style license
Free software, commercial support available
ulaknode is available under a permissive BSD-style license, so you can deploy and use it freely on your own infrastructure. There are no per-user, per-mailbox, or per-domain license fees.
For organisations that want expert help, commercial support is available for purchase from itefix.net. Support plans start at $549 per year, with discounts for two-year and three-year terms, as well as volume pricing for multiple installations.
Commercial support can include deployment guidance, migration help, upgrades, troubleshooting, and deliverability tuning.