Asked for by John, 2026-09-19. Public ihasmail is Stalwart-facing and knows
nothing about INBUXA, so running an unmodified one against the migrated
server checks something the fork's own suites cannot: that a client written
for upstream still works.
Each difference it finds is one of two things, and the point is to say
which: a regression against upstream's contract, which the fork's tests
would not catch because they test the fork; or a feature that now expects
INBUXA's own front ends, which belongs in the contract and the release
notes rather than in a user's surprise.
After mail is flowing, not as a gate. It informs the contract; it doesn't
block a cutover.
INBUXA's cutover is the first run of something other operators will want:
an existing Stalwart server becoming an INBUXA one with nothing re-entered
and nothing re-issued. Accounts, passwords, app passwords, OAuth sessions,
aliases, tenants, DNS records and provider settings, certificates and ACME
state, Sieve scripts, the queue and the mail all live in the store, so a
migration that copies the store carries them.
Offered beside the fresh-install workflow, which has different questions to
ask, so §6.1 now names both.
It rolls back, which is where it parts company with stalwart-migrator:
that one upgrades in place and says outright it cannot undo a migration.
This one never writes to what it migrates from, so going back is stopping
one service and starting another. Rollback is automatic when verification
fails, available on demand while the old install stands, honest about the
mail that stays behind, and never points the old server at the store the
fork has written.
Every phase is timed, and the number to advertise is the downtime, phases
2 to 7, not the total that preflight and the copy dominate. The report
writes both as JSON so a release note quotes something measured.
jcoffey-dev