Hosted inboxes for AI agents with model-assisted email trust reports, custom domains, MCP/API access and webhook delivery.
MachineMail gives developers and teams a hosted email workspace for software agents. Agents can receive mail, wait for a message, prepare drafts and send replies through an API or MCP connection. Custom domains and catch-all addresses support separate inboxes for different jobs.
Incoming mail is paired with a trust report before an agent reads it. The documented pipeline combines authentication and sender-history checks with deterministic rules and a hosted model. It assesses spam, phishing, instructions aimed at an agent, credential or payment requests, and urgency. Reports expose the contributing reasons so applications can decide what an agent may read or act on.
The service also provides a browser dashboard, scoped API access, customer-isolated pods and signed webhooks with retry and replay support. Developers can keep outbound messages as drafts for human review. Model failures fall back to rule-based classification; trust labels help applications apply safeguards but do not guarantee that a message is safe.
Source: Product Hunt, #8 on 2026-11-03.
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