Outbox on core's messaging SPI, providers as data rows (SMTP, SES,
Postmark, SendGrid, Mailgun, Gmail), Markdown and MJML/HTML templates
with versions and dark-mode-safe branding, delivery tracking through
signed webhooks, suppression, RFC 8058 unsubscribe, PHI rules, consumer
migrations and the inbound phase. Owner decisions (2026-10-12): all
recommendations accepted.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
james.maesandClaude Opus 5.5