One control room for every Instantly sending mailbox

Build me an app that works as a single control room for the health of my cold email sending infrastructure. I run outbound from dozens of sending mailboxes across many domains, and today the only way to check on them is to click through Instantly account by account. I want one screen instead.

The main view is a grid of every sending account, loaded from Instantly's List Email Accounts. Group the rows by sending domain, because reputation damage travels domain-wide and one bad mailbox drags its siblings down with it. Each domain gets a group header showing the domain name, how many mailboxes sit on it, and the worst health flag among them, so a bad domain is obvious before I expand anything.

Each mailbox row shows: the email address, its warmup status pulled from Get Warmup Analytics, how many emails it has sent today versus that account's own configured daily sending limit from Get Daily Account Analytics (show it as sent of limit plus the percentage of the limit consumed), its recent bounce rate, and a red / amber / green health flag.

Bake in these health rules. A mailbox is RED if its bounce rate is above four percent, or if it fails Test Account Vitals, or if Instantly reports it as disconnected or inactive. AMBER covers the warning band: bounce rate climbing between roughly two and four percent, warmup switched off while the account is actively sending, or the account running at or over its daily limit. Everything else is GREEN. Sort so the riskiest float to the top: red first, then amber, then green, and inside each band sort by bounce rate highest first. Order the domain groups themselves by their worst member, so the most damaged domain is the first thing I see.

From any row I want to act without leaving the screen. A Run vitals button calls Test Account Vitals on demand and shows the pass or fail result inline with whatever detail comes back. A warmup toggle calls Enable Warmup for Accounts or Disable Warmup for Accounts. An editable daily limit field writes the new value back with Update Email Account. After any action, refresh that row and recompute its health flag. Note that the warmup enable and disable calls kick off background jobs rather than finishing instantly, so show a pending state on the toggle until the change is confirmed.

Each domain group header gets a "Diagnose this domain" button that kicks off a background agent. The agent gathers every mailbox on that sending domain, pulls Test Account Vitals and Get Daily Account Analytics for each one, works out which campaigns those mailboxes feed, and pulls Get Campaign Analytics for those campaigns. It should pay special attention to campaigns sitting in Instantly status -1 (Accounts Unhealthy) or -2 (Bounce Protect), since those are direct signals that sending health is already hurting delivery.

The agent then writes a plain English remediation brief back into the app, stored against that domain and displayed in a panel on the domain group with a timestamp, keeping past briefs as history so I can see whether a domain is recovering or getting worse. The brief should say what is actually wrong, name the worst offending mailboxes and campaigns, state whether the problem is domain-wide or isolated to one or two accounts, and give specific recommended steps such as resting the domain, cutting a daily limit to a particular number, re-enabling warmup, or pausing a campaign. Write it for a human operator, not as a data dump.

Two follow-up actions hang off the brief. First, a button to run Pause Campaign on the worst offending campaign the agent identified, with a confirmation step before it fires. Second, a button to post the brief to a Slack channel using the Slack Send a Message action, with a channel picker so I choose where it lands.

A few details that matter: persist my daily limit edits and the generated briefs, show when the grid data was last refreshed with a manual refresh button, and keep the whole grid readable on one screen. Dense is fine, I would rather see forty mailboxes at once than scroll through paginated cards.