For the durable jobs outbox (QRun-IO/qqq#1191, spec section 2.13):
- Each queued message stores one RFC 5322 Message-ID (email_message.rfc_message_id,
unique), derived from the idempotency key (else a stable per-message seed),
and reuses it on every attempt. SMTP, Postmark, SendGrid and Mailgun send it.
SES receives it in the raw MIME but replaces it; this is documented, and
X-QQQ-Email-Id stays on every transport.
- EmailEffects.send(request, effectKey) hands an email to qbit-email's outbox
exactly once per key: QUEUED_OR_DUPLICATE, or REFUSED (suppressed or
invalid; never retried).
- findByIdempotencyKey / findByRfcMessageId look an email up for a reconcile.
- docs/DURABLE-JOBS.md has the outcome mapping and the binding class to add
when QQQ RC.7 ships (EmailJobEffectTarget implements core's EffectTarget;
no SNAPSHOT dependency now).
- Postgres upgrade SQL for existing installs; checkstyle now also covers test
sources (the repo standard), with the existing violations fixed.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>