Postfleet
Email infrastructure for AI agents. Inbound mail is parsed, classified, extracted to your JSON schema, and screened for prompt injection first.
About Postfleet
Postfleet is email infrastructure for AI agents. Every inbound message is parsed, classified, and extracted to your JSON schema, and screened for prompt injection before your agent reads a word. Hidden text, zero-width characters, and homoglyphs are stripped, and every removal is logged in a sanitization report you can read.
Your agent gets JSON, or it gets nothing. Flagged mail is delivered deterministic-only and fails closed, never as trusted content.
Connect over MCP: use the hosted endpoint from any MCP client, or run the local npx package. Tools include create_mailbox, send_email, reply_email, list_inbox, read_email, and wait_for_email. Agents can sign themselves up over MCP.
Pricing: the Free plan is $0/mo with no card and includes 100 comprehended messages per month, 3 mailboxes, and 3,000 sends per month. Paid plans are Starter at $7/mo, Pro at $20/mo, and Scale at $200/mo, with higher message, mailbox, and send limits. Sanitization runs on every message on every tier.
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