Owner, 2026-10-11: the queue goes out of the command's archive too.
The commit that made the panel's backup work left the queue in the
archive of selfpost-backup, which runs as root and can read it. But that
copy was never the queue: the archive is made while the instance runs,
Postfix moves messages between the queue's directories all the time, and
a message on its way could be in the archive twice or not at all. One
rule now - QueueDir is left out of every archive - and
Params.Unprivileged is only about a certs/ file the panel may not open.
What is not carried over is mail still waiting for delivery; a restored
instance builds an empty queue (the e2e restore scenario starts one).
To keep the queue: stop the instance and tar the project directory, as
the guide's methods 3 and 4 already describe.
Guide: the description of a full backup, methods 1 and 2 and the
comparison table. Help follows the design commit before this one.
go vet ./internal/backup/: ok
go test ./internal/backup/ ./cmd/... ./internal/web/...: ok
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>