Show HN: I wrote an email app that accepts only one sender per inbox

Clova.Email is a new email service that creates unique, single-sender inboxes to combat spam and protect privacy—each inbox accepts mail from only the first sender, making leaked or resold email lists useless. The app offers three inbox types (one-sender, temporary, and prefix-based), free and paid plans starting at $30/year, and integrates with AI assistants via MCP for automated tasks like managing signups and receipts.