main is protected as of today -- no force-push, no deletion, and a pull
request with a green build to merge -- and GITHUB_TOKEN is not a bypass
actor. `git push origin HEAD:main` in the cut job would have been refused
from Monday, on a scheduled run nobody watches.
GitHub would not take the obvious fix. Adding the Actions integration as a
bypass actor is rejected ("must be part of the ruleset source or owner
organization") because the organization has no app installations. The
other two routes -- an organization-level ruleset, a deploy key with write
access -- both amount to handing the release a credential that outranks
the rule, which is a worse thing to own than a slower Monday.
So the bump lands the way every other change does. It commits to
release/v<version>, opens a pull request, waits for the build the ruleset
requires, merges, and tags what came out. The waiting is not merely the
rule being satisfied: a release cut from a tree that does not compile is
the failure this whole arrangement exists to prevent, and until now
nothing checked.
Three details that would each have produced a wrong tag. The sha comes
from GitHub's merge commit, not the tip that was pushed, because a rebase
merge rewrites it. The pull request is tracked by number, not by branch,
because the branch is deleted on merge and a deleted branch no longer
resolves to its pull request. And a failed or slow build leaves the pull
request open and cuts nothing, rather than tagging whatever main happened
to hold.
Quiet weeks are unaffected: the tag still names the bump commit, so
`previous..HEAD` is still zero when nothing else has landed.
The cost is a Monday run that now takes as long as a full build -- about
25 minutes at the moment, most of it saving the cache.
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.