MachineMail

Email API for AI agents: free inboxes on a shared domain or your own, a trust report on every inbound message, a REST API that follows AgentMail's paths and field names, webhooks and an MCP server.

EmailNewFree tier listed

Pricing as listed on the vendor site on Oct 26, 2026: free tier Free: $0/mo, 3,000 messages a month (in and out combined, up to 100 a day), 1 GB storage, 1 custom domain, 1 seat, unlimited inboxes; paid from $9 per month (Pro), 7,500 inbound and 2,500 outbound messages, then you pay for what you use past that.

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