Replace your cold email agency's master inbox spreadsheet

Build me an app that replaces the master inbox registry spreadsheet my cold email agency keeps. We run one InfraForge workspace per client and never mix client inboxes, so the client switcher is the primary navigation and every view, action, and export in the app stays scoped to a single workspace. There should be no screen that lists mailboxes from two clients side by side.

The app opens on a client list built from InfraForge List Workspaces, one row or card per workspace. Each client shows its workspace name, a domain count from InfraForge List Domains, a mailbox count from InfraForge List Mailboxes filtered to that workspace, and a credit cost line, since domains and mailboxes charge our account balance the moment they are bought. Build the cost line from whatever price or cost fields the domain and mailbox records carry, and show the account level balance and auto topup threshold from InfraForge Get Credit Balance Settings in a header strip above the list so we can see runway while we browse. Selecting a client sets the active workspace for the whole app and keeps it selected as we move between views.

The client detail view has two sections. A domains section lists every domain in that workspace from InfraForge List Domains, with its status and how many mailboxes sit on it. Below that is the registry table itself: every mailbox in that workspace from InfraForge List Mailboxes, called with the workspace id and with credentials enabled, since passwords and IMAP or SMTP details are only returned when credentials are requested. Each row shows the mailbox email address, display name, the domain it belongs to, its forwarding address, and its signature. Keep the password and the IMAP and SMTP connection details behind a reveal control on the row rather than printing them in the table. Make the table searchable by address and sortable by domain and by status.

Every row is cross referenced against Smartlead. Load the sending accounts once per view with Smartlead List Email Accounts and match them to InfraForge mailboxes by email address, using Smartlead Get Email Account for the detail of a matched account. Pull Smartlead List Campaigns and, for each campaign, Smartlead List Campaign Email Accounts to work out which addresses are actually attached to a campaign and which campaign that is. For each matched account, show the last seven days of warmup from Smartlead Get Warmup Stats as a compact summary such as sent, landed in inbox, and spam, plus a simple health read. So each row answers three questions at a glance: does this address exist in Smartlead, is it attached to a campaign, and is its warmup healthy. Rows with no Smartlead match should say so clearly rather than showing blanks.

From a row I can act without leaving the page. Edit opens the mailbox and saves changes with InfraForge Update Mailbox, covering the display name, password, forwarding address, and signature, which are the fields we correct most often. Delete removes a dead mailbox with InfraForge Delete Mailbox behind a confirmation that names the address being deleted. Both actions refresh the table in place.

An Export button on the client page pulls the whole workspace as a CSV with InfraForge Export Mailboxes. That call returns plain text CSV rather than JSON, so handle it as a text body. Each client has a default export format we set once and store, chosen from the valid formats: Smartlead, Instantly, Reply.io, Woodpecker, and Masterinbox. The export offers a download and a Send to Slack option that posts the CSV into that client's channel using Slack Bot Upload a File, followed by a short Slack Bot Send a Message summary naming the client, the mailbox count, and the export format. Store each client's default export format and Slack channel id in the General Input Database, keyed by workspace id, so the team is never picking them again.

Add a Run audit button on each client that kicks off a background agent scoped to that one workspace. The agent lists the workspace's domains and mailboxes from InfraForge, calls InfraForge Get Domain DNS for each domain, pulls Smartlead List Email Accounts plus Smartlead List Campaigns and Smartlead List Campaign Email Accounts, and calls Smartlead Get Warmup Stats for each matched sending account. It then writes a findings brief with three sections: mailboxes that were provisioned in InfraForge but never attached to any Smartlead campaign, including how long they have been sitting idle and what they are costing; mailboxes with weak warmup over the last seven days, such as very low volume or a meaningful share landing in spam; and domains with missing or incomplete DNS records. Each finding should name the specific mailbox or domain so it can be acted on from the table. Save the brief in the General Input Database against the workspace id with a timestamp, and render the latest one on the client page with the run time and a history of previous audits. While an audit is running, show its status on the client card, and keep the rest of the app usable.

Design nuance: this is exception based management, so the client list should surface how many open findings each client has from its last audit, and the mailbox table should let me filter down to just the flagged rows. Empty states matter, since a brand new client workspace will have domains but no mailboxes yet. Keep everything read fast: cache the Smartlead account and campaign lookups per view rather than refetching per row.