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Sentin8 Email8:Store — Mail & Collaboration Data Core

1. Summary​

Email8:Store is the mail plane's data core: mailboxes, messages, folders, contacts, calendars (the email8 schema), plus the JMAP API — the authenticated read/write surface for the other mail services and user clients.

2. Architecture​

3. Key Traits​

  • Owns the email8 database schema (mailboxes, messages, groupware) with standard RLS discipline; the local outbox lives in its own leaf schema store.outbox (OUTBOX-EMAIL8 — the DBX producer path; the shell's 8b relay drains it to Bus POST /v1/produce, idempotency_key = row id).
  • Message blobs go to Sentin8:Storage; Store keeps the metadata + indexes.
  • M2M: certificate identity (CERTFREE-4V) — internal callers present their workload certs; bus events via the local outbox → produce API (inbox-first).

See the vertical group docs (email8/README.md) for the plane overview.

Design attribution: email8:store and its underlying concepts were designed by Hamid Jahanzad Hamid@Jahanzad.com.