Personal-data catalog spec, §7 (settled 2026-09-28). sysComplianceGet (673) sees the data inventory and compliance overview: superusers and, for their tenant's slice, tenant administrators, by default and through the one-time grants on servers that already have their roles stored. A Compliance Officer role at server level holds it with reading and exporting the audit log, placing, widening, releasing and exporting legal holds, seeing account locks, and reading accounts, lists, domains, tenants and roles. It changes no server setting, creates or deletes no account, and can't shorten audit retention. A tenant's accounts can hold only roles of their own tenant (MT-3), so the tenant role is one "Compliance Officer" role per tenant, without holds (LH-13): made once for every tenant a server has, and whenever a tenant is created. While nobody holds it, it is removed with its tenant so it doesn't block the delete, and put back if the delete is refused for another reason. Both roles carry a user's own permissions too, since roles given to a person replace the default user role, which a tenant's accounts can't hold anyway. Every server makes these once, new or existing -- the built-in roles are only made on a server with none -- and records each under P c, so a role an administrator deletes stays deleted. Tested: unit tests (neither role changes a setting beyond a user's own; holds for the server's officer only; per-place records); a new compliance system test (one server-level role; an officer reads the audit log, places and releases a hold, and is refused a setting, an account and audit retention; a tenant gets its role, whose holder reads the tenant's audit log and no holds; a tenant with an unused role is deleted and the role goes with it); the system, audit, legal hold, account lock and SCIM suites; fork checks. The directory suite needs its LDAP container and wasn't run here.
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.