#5509 "Delivery you can see: each alert's email state in history, and
outgoing email on Settings -> System" (milestone 501).
- Alerts -> History: an alert's email reads from the outbox (#5506):
"gathering" with when it sends, "sending", "retrying" with the attempt,
next try and the server's last answer, "sent", or "failed" naming each
reader it didn't reach and why (outbox.delivery / email_states). Events
from before the outbox keep what they recorded. The Notified column
shows once an alert has a queued email.
- Settings -> System gets "Outgoing email": every email of the last 7
days not yet sent, failures first, then the longest retrying, with
recipient, kind, state and last error, and a count of what was sent.
Failures and anything still retrying after 5 minutes lead the page's
verdict (outbox.outgoing).
- get_alert_history (MCP) adds `email`: the same delivery state.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
