The AGPL asks a modified version to carry prominent notices saying it was modified, and giving a date. Publishing the source is the conveyance that asks for it, so it wants doing before the repository is public rather than at the release. Every upstream file the fork changed now says so in its header, beneath the notice it came with: 164 files, found by diffing against the upstream snapshot branch rather than by guessing, so the list is what actually differs. Files the fork wrote itself already carry their own copyright and need nothing. Upstream's notices are untouched, which its licence requires and which was already true. The README says the same thing in prose, since the obligation is on the work as a whole and not only its Rust files. Builds unchanged: the server and the test binary both compile.
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71 lines
3.1 KiB
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<p align="center">
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<img src="./img/brand/inbuxa-lockup-light.svg" alt="inbuxa" height="140">
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</p>
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<h3 align="center">
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A complete mail and collaboration server, every feature included, under the AGPL
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</h3>
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---
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**INBUXA** is a mail and collaboration server: JMAP, IMAP, POP3, SMTP,
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CalDAV, CardDAV and WebDAV, in one Rust binary, with ihasmail as its web front
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end. It is a fork of [Stalwart](https://github.com/stalwartlabs/stalwart).
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Project site: [inbuxa.org](https://inbuxa.org) (not up yet).
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Stalwart ships some features only in a paid Enterprise Edition: multi-tenancy,
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masked email, undelete and others. INBUXA ships everything to everybody under
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the AGPL-3.0, rebuilding those features independently and without using any
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of Stalwart's Enterprise code.
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## What's different from Stalwart
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- **Every feature, one edition.** No license key, no edition checks, no
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upsell. See `docs/spec/SPEC.md` §4 for the features being rebuilt, and
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`docs/spec/features/` for each one's specification.
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- **Webmail and administration by ihasmail,** as a separate service that can
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run beside the server or elsewhere. Stalwart's own web interface is removed,
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so there's no web front end on the mail host.
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- **Clean-room rebuilds.** Enterprise-only code is stripped from every
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upstream release before it's imported. The rebuilt features are written
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from specifications that use only public sources (`docs/spec/SPEC.md` §3).
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## How the fork is kept
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Upstream releases arrive as stripped snapshots, never with upstream's git
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history, which contains Enterprise code. `tools/fork/strip.py` builds each
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snapshot on top of upstream's own `ossify.py`, then verifies it independently.
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The report for every import is in `docs/fork/strip-reports/`. See
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`docs/spec/SPEC.md` §2.
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## Building
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```bash
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cargo build --release -p inbuxa # the binary is target/release/inbuxa
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docker build -t inbuxa . # or the container image
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```
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Settings are read from `INBUXA_*` environment variables. An existing Stalwart
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install's `STALWART_*` variables still work, with a warning to rename them.
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New installs keep their data in `/var/lib/inbuxa` and logs in
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`/var/log/inbuxa`. Existing installs keep the paths their configuration
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already names, so none of their data moves.
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## License and credits
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INBUXA is free software under the [GNU Affero General Public License,
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version 3](./LICENSES/AGPL-3.0-only.txt).
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It is a fork of Stalwart, copyright © Stalwart Labs LLC, **modified by
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Coffey Labs in 2026**. Upstream's copyright notices are kept on every file
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they cover, and every upstream file this fork changed says so in its header,
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under the notice it came with. Stalwart's files are dual-licensed
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AGPL-3.0-only or Stalwart's Enterprise License, and INBUXA takes them under
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the AGPL-3.0 only. A few of those files also carry code from other projects
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under MIT or BSD licenses, which stays under those licenses;
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[THIRD-PARTY.md](./THIRD-PARTY.md) lists it with its notices. "Stalwart" is
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Stalwart Labs' name. INBUXA isn't affiliated with or endorsed by Stalwart
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Labs.
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The INBUXA mark reuses ihasmail's cat-and-envelope artwork.
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