Postfleet
Prompt-injection-safe email for AI agents
Postfleet launched on July 18, 2026 with 13 votes, #1,232 of 24,623 launches that month and more than 90% of that year's launches.
What it does
AI agents are getting email but raw inboxes are an attack surface: prompt injection, spam, malicious files. Postfleet is email infrastructure for agents. Every inbound message is verified, spam/virus-screened, and checked for prompt injection before your agent reads it, then delivered already parsed and comprehended. Outbound is idempotent with optional human approval. 6 MCP tools + a REST API. Would love your feedback!
Email infrastructure for AI agents. Inbound is parsed, classified, extracted to your schema — and screened for prompt injection — before your agent reads a word.
Your agent gets JSON. Or it gets nothing. Never the raw email. Every inbound message is parsed, classified, extracted to your schema — and screened for prompt injection — before your agent reads a single word. { "classification" : "invoice" , "confidence" : 0.95 , "extraction" : { "vendor" : "Globex Corporation" , "amount" : 3750 }, "sanitization" : [{ "kind" : "hidden_text" , "detail" : "white-on-white div removed" }] } Field 02 — Notice Raw email is attacker-controlled input. Hidden text, zero-width characters, HTML your parser trusts and your model obeys — piped straight into your agent's context, with its tool access and its credentials. Every inbox API on the market hands you that…from postfleet.ai
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