jcoffey-dev
674ae5d037
A release published an image and nothing else, so there was nothing for a host install to download -- the only way to get the binary was to pull the image and copy it out, which makes "install without Docker" depend on Docker. Each release now carries inbuxa-linux-amd64.tar.gz, inbuxa-linux-arm64.tar.gz and SHA256SUMS, named as stalwart-migrator's are. They are taken out of the image this pipeline just pushed rather than compiled again. A second Rust build per architecture is the slowest thing here, and it would leave two artifacts that are meant to be the same build and only probably are. Extracting makes that identity a fact: the binary in the tarball is the file the image runs. `docker create` starts nothing, so copying a file out of an arm64 image on an amd64 runner needs no emulation. One thing the extraction cannot carry: the image grants the binary cap_net_bind_service, and a tar archive does not keep that xattr. The release body says so, and says what to do instead -- setcap, or AmbientCapabilities in the unit -- because a server that cannot bind 25 and does not say why is a bad first hour. Checked by hand against v2026.9.23 before this landed: both architectures extract to the right ELF, and the amd64 binary runs on a bare Debian 13 with every library resolved and reports its own version.
A complete mail and collaboration server, every feature included, under the AGPL
INBUXA is a mail and collaboration server: JMAP, IMAP, POP3, SMTP, CalDAV, CardDAV and WebDAV, in one Rust binary, with ihasmail as its web front end. It is a fork of Stalwart. Project site: inbuxa.org. Documentation: docs.inbuxa.org.
Stalwart ships some features only in a paid Enterprise Edition: multi-tenancy, masked email, undelete and others. INBUXA ships everything to everybody under the AGPL-3.0, rebuilding those features independently and without using any of Stalwart's Enterprise code.
What's different from Stalwart
- Every feature, one edition. No license key, no edition checks, no
upsell. See
docs/spec/SPEC.md§4 for the features being rebuilt, anddocs/spec/features/for each one's specification. - Webmail and administration by ihasmail, as a separate service that can run beside the server or elsewhere. Stalwart's own web interface is removed, so there's no web front end on the mail host.
- Clean-room rebuilds. Enterprise-only code is stripped from every
upstream release before it's imported. The rebuilt features are written
from specifications that use only public sources (
docs/spec/SPEC.md§3).
How the fork is kept
Upstream releases arrive as stripped snapshots, never with upstream's git
history, which contains Enterprise code. tools/fork/strip.py builds each
snapshot on top of upstream's own ossify.py, then verifies it independently.
The report for every import is in docs/fork/strip-reports/. See
docs/spec/SPEC.md §2.
Building
cargo build --release -p inbuxa # the binary is target/release/inbuxa
docker build -t inbuxa . # or the container image
Settings are read from INBUXA_* environment variables. An existing Stalwart
install's STALWART_* variables still work, with a warning to rename them.
New installs keep their data in /var/lib/inbuxa and logs in
/var/log/inbuxa. Existing installs keep the paths their configuration
already names, so none of their data moves.
License and credits
INBUXA is free software under the GNU Affero General Public License, version 3.
It is a fork of Stalwart, copyright © Stalwart Labs LLC, modified by Coffey Labs in 2026. Upstream's copyright notices are kept on every file they cover, and every upstream file this fork changed says so in its header, under the notice it came with. Stalwart's files are dual-licensed AGPL-3.0-only or Stalwart's Enterprise License, and INBUXA takes them under the AGPL-3.0 only. A few of those files also carry code from other projects under MIT or BSD licenses, which stays under those licenses; THIRD-PARTY.md lists it with its notices. "Stalwart" is Stalwart Labs' name. INBUXA isn't affiliated with or endorsed by Stalwart Labs.
The INBUXA mark reuses ihasmail's cat-and-envelope artwork.