- Cards and charts link to the page they're about: pending messages to the
queue, bans to blocked IPs, report warnings to the reports, and so on,
shown only to viewers who may open that page.
- A one-line status under the greeting: what needs a look (failed tasks,
messages retrying, recipients given up on) or, when nothing does, what's
there. Each phrase is a link.
- Counts from the server's own objects stand in for live metrics it can't
report, and a live number with no source reads as unknown, not zero.
- Who uses the space: a treemap of people sized by storage, colored by how
near their quota they are, each tile opening the account.
- Where mail is waiting: queued recipients by destination, split into
waiting, retrying and given up, each row opening the filtered queue.
- The weekly rhythm: messages by hour and weekday, shown once metric
history exists.
- Dashboard tabs are titled by their label.
