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Postfleet

Email for AI agents, screened for prompt injection

Postfleet preview

About

An inbox that treats incoming mail as untrusted input

Postfleet is email infrastructure for agents that puts a trust boundary between the wire and the model. Every inbound message is verified, cleaned, stripped of hidden text, zero-width characters and homoglyphs, spam and virus gated, and scanned for prompt injection before it is extracted to your JSON Schema with a confidence score. Risky mail never reaches extraction. Agents connect over a hosted MCP server or the open-source `@postfleet/mcp` package (16 tools, including `wait_for_email` and a draft approval flow where a human signs off before a send).

Features

  • Agent-provisioned mailboxes over REST or MCP
  • Prompt injection scan and sanitization report
  • Schema extraction to typed JSON
  • Draft approval gate and wait_for_email

Install

  • Claude Code
  • Codex
  • Cursor
  • Grok Bot

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