Dev Tools · 1h ago
Self-hosted mail server gives each AI agent its own inbox
A developer built openagent.email, a self-hosted mail server that gives each AI agent its own mailbox on a custom domain. The system uses a single catch-all Postfix/Dovecot mailbox with logical identities, enabling fast creation of throwaway addresses. It runs as two containers, idles at 190 MB RAM, and has 268 automated tests.
Meridian48 take
The architecture solves a real security problem—credential leakage through third-party email APIs—but its reliance on exact address matching as the sole security boundary is brittle if not carefully maintained.
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Giving every AI agent its own mailbox: the architecture behind a self-hosted MCP mail server →
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