Mnexa-AI released e2a, an authenticated email gateway designed for AI agents. The service accepts inbound mail, verifies SPF/DKIM, adds HMAC‑signed X‑E2A‑Auth headers, and forwards messages via webhook for cloud agents or WebSocket for local bots. Outbound mail passes through an HTTP API, optionally held for human‑in‑the‑loop approval before relaying through SMTP providers such as SES, for secure automation in production environments.

Developers can run e2a on the hosted platform at e2a.dev, which supplies a shared domain for instant slug‑based onboarding without DNS changes, or self‑host via Docker Compose. The stack includes a Postgres backend, an API server on port 8080, an SMTP relay on 2525, and a Next.js dashboard on 3000 for managing agents, domains, and signing secrets, and supports API key rotation.

Every delivery carries signed authentication headers; recipients verify the HMAC using a secret stored in the dashboard, preventing replay attacks and ensuring the sender’s identity. Conversation threading is preserved through a conversation_id field, and agents can operate in cloud (webhook) or local (WebSocket) mode. The project is open source on GitHub, inviting contributions to add DMARC, multi‑region HA, and compliance attestations, as the ecosystem evolves.