Personal-data catalog spec, §6 (Phase 3c). inbuxa:DataInventory/get evaluates the catalog against the server's live settings and says what this server holds: for each source and each object that can hold personal data, its categories and whose data it is, whether it is collected here at all, what bounds its retention (the live value of the setting that does, or unbounded), whether it leaves the host and to which endpoints, and a summary. Every host that receives something is listed once as a candidate processor with what it receives. Inside a tenant it answers with the tenant's slice and none of the server's processors. Read-only, with sysComplianceGet. inbuxa:InventorySnapshot/get is the history: a dated copy of the evaluated inventory, recorded when it changes -- after a registry write to an object the inventory reads, after inbuxa's log, audit or AI settings change, and on the daily clean-up -- and kept as long as the audit log's records. ids: null lists every snapshot, newest first; the full inventory only when asked for. The catalog is embedded and parsed at start (new dependency: toml, MIT/Apache); the evaluation is a pure function of it and the live facts, so each configuration is tested without a server. Loopback endpoints stay on the host; any other configured endpoint leaves it. Tested: unit tests for the evaluation (a new install's defaults, an external blob store, a hosted AI endpoint, telemetry off, a tenant's slice, hosts from URLs, loopback), snapshots, and the fact gathering's store and duration rules; the compliance system test, extended (the officer reads the inventory, a plain user is refused, a tenant's officer sees its slice and no processors, a webhook to another host becomes a processor and a snapshot names x:WebHook, a retention change reads through); the system, audit, legal hold and account lock suites; fork checks. The system suite failed once of three runs with an email import's blob not found, in antispam.rs; the same happened once in purge.rs on the previous branch. Nothing here touches uploads; noted for a separate look.
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 aren't read: the server stops at startup and
names each one to rename.
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.