Warmup Inbox

Native integrations

Connect each mailbox from Gmail and Google Workspace, Outlook and Microsoft 365, Amazon SES, Zoho Mail or SendGrid. After warm-up, the same mailbox goes into your sending tool such as Smartlead or Instantly.

An idea: add a rule that a new mailbox does not join a live campaign until its placement is healthy in the dashboard.

API and webhooks

The vendor released an API that is available on all plans. According to its announcement, you can add inboxes at scale, start or pause warm-up for any address and read inbox health stats.

An idea: when you create a mailbox for a new client or campaign, call the API to add it to warm-up automatically, then check its health before the first send.

There is no official MCP server that I could find.