e2a — email for AI agents

Gives your AI agent a real email address with full SPF/DKIM verification on incoming mail and HMAC-signed auth headers so you know whether the sender is human or another agent. Exposes tools for sending email (with optional human-in-the-loop approval before it goes out), fetching messages, and managing per-agent inboxes. Built for both cloud webhooks and local WebSocket delivery, so you don't need a public URL to receive mail. The relay handles agent-to-agent SMTP directly and routes agent-to-human mail through your upstream provider. Useful when you want your agent to participate in real email threads with verified sender identity instead of faking From addresses or scraping IMAP.