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  v27.1-rc.5 Pre-Release

  jcoffey-dev released this 2026-10-31 05:18:55 +00:00 | 49 commits to main since this release

  The fifth release candidate of the 27.1 series. It brings inbuxa Relay, a small relay for a public machine, and moving a domain in from inbuxa Admin. It has no security fixes.

  inbuxa Relay

  A small relay that takes mail in on port 25 for your server, and can send its mail on, so the server itself never opens a mail port to the internet. Your server dials out to it, and you manage it from inbuxa Admin, under Settings › Mail flow › Sending › Relays.

  • While its link to your server is up, your server decides on each message during the sender's session: your spam filter, directory and rules answer at the door.
  • While the link is down, it holds mail for your addresses, encrypted to your server's key, and passes it on once the link is back.
  • Outgoing mail goes through it with DKIM signed by your server, DANE and MTA-STS.
  • Your server publishes its MX and SPF records where it manages a domain's DNS, and orders its certificate by DNS-01.
  • Upgrades from inbuxa Admin take a signed release.
  • Hardening: a list of who may dial the link, replacing the link CA without a new join, and the relay keys wrapped under a key file (INBUXA_RELAY_KEY_FILE).

  It ships from this tag as registry.coffeylabs.org/inbuxa/inbuxa-relay:27.1-rc.5 (linux/amd64, linux/arm64), and as static binaries inbuxa-relay-x86_64-linux-musl and inbuxa-relay-aarch64-linux-musl, each with a .sig file by the inbuxa release key. Run it with the server release of the same version. Docs: https://docs.inbuxa.org/run/relay/

  Migrations

  An administrator can move a domain in from another server under Management › Directory › Migrations in inbuxa Admin, from IMAP, JMAP, Microsoft 365 or Google Workspace: preview, move, final pass, and the new accounts' passwords once. The server runs the bundled inbuxa-migrate 27.1-rc.8. It needs the new Run migrations permission, which only the Administrator role has.

  Changed

  • The store now carries inbuxa's own store version. A store marked by a newer release is refused before anything writes to it, with a message pointing at that release or the pre-upgrade backup.
  • A store brought over from Stalwart 0.16 has upstream's web interface switched off the first time inbuxa opens it, so it is no longer served at /admin. The log says how to switch it back on.

  Container image: registry.coffeylabs.org/inbuxa/inbuxa-server:27.1-rc.5, also tagged :27.1-rc. :latest stays on 2026.x until 27.1 ships.

  Downloads

  • SHA256SUMS
    379 B

    2026-10-31 06:06:27 +00:00
  • inbuxa-linux-amd64.tar.gz
    51 MiB

    2026-10-31 06:06:18 +00:00
  • inbuxa-linux-arm64.tar.gz
    47 MiB

    2026-10-31 06:06:24 +00:00
  • inbuxa-relay-aarch64-linux-musl
    6.3 MiB

    2026-10-31 06:06:26 +00:00
  • inbuxa-relay-aarch64-linux-musl.sig
    238 B

    2026-10-31 06:06:56 +00:00
  • inbuxa-relay-x86_64-linux-musl
    8.0 MiB

    2026-10-31 06:06:25 +00:00
  • inbuxa-relay-x86_64-linux-musl.sig
    237 B

    2026-10-31 06:06:56 +00:00
  • Source Code (ZIP)
  • Source Code (TAR.GZ)