MachineMail

Key facts: MachineMail launched on Product Hunt on November 2, 2026. It gives AI agents real email inboxes of their own, so they can complete workflows that depend on email: signing up for services, waiting for verification codes, and replying to messages. Agents connect over MCP or a REST API, use your own domain, and every inbound message arrives as agent-safe text with a trust report and a level (verified, known, unknown, suspicious or quarantined) before your agent sees it. Webhooks are signed, retried for five days and replayable, and Pods give each customer a separate space with their own inboxes, domains and API keys.

Plans: Free: $0, with 3,000 messages a month (up to 100 a day), 1 GB of storage, one custom domain and one seat, with unlimited inboxes on every plan. Pro is $9 a month, Team $49 and Scale $199. Overage is $1.00 per 1,000 inbound messages and $0.50 per 1,000 outbound recipients; quarantined or spam mail is never billed. A launch offer gives 50% off any plan for three months with a Product Hunt code.

Best for: Builders whose agents need to send and receive real email safely. Who should skip it: anyone whose agents never touch email, or who needs a human inbox rather than an agent one.

Pros

• Free plan with 3,000 messages a month and unlimited inboxes, no card
• Every inbound message carries a trust report and level, so phishing is flagged before your agent acts
• Connect over MCP or API, on your own domain, with an AgentMail-compatible API
• Quarantined and spam mail is never billed, and webhooks are signed and retried for five days

Watch out for

• On Free, excess inbound mail is held until the allowance resets and sending pauses
• A new launch with no named customers published yet
• Free covers one seat and one domain: teams and multi-domain setups need a paid plan

Best for

Builders whose agents need to send and receive real email safely. Who should skip it: anyone whose agents never touch email, or a team that needs a production agent that cannot wait out a monthly allowance reset.

Pricing

Free: $0, 3,000 messages/month (up to 100/day), 1 GB, 1 domain, 1 seat, unlimited inboxes. Pro $9/month, Team $49, Scale $199.

FAQs

What is MachineMail? Real email inboxes for AI agents: each agent gets its own address, connects over MCP or API, and reads mail as agent-safe text with a trust report.

What is free? The Free plan is $0 with 3,000 messages a month (up to 100 a day), 1 GB of storage, one custom domain and one seat, with unlimited inboxes.

How does it stop phishing? Every inbound message gets a trust report and a level (verified, known, unknown, suspicious or quarantined) before your agent sees it.

Can my agent get a sandbox inbox? Yes. Point your agent at the auth.md on the site and it registers itself, gets a sandbox inbox, and shows you a six-digit code to claim it.