docker-mailbox v0.1.0 — first release REST + MCP control plane over IMAP/SMTP. One process, one port, one bearer-auth gate. Configure mailboxes in config.yaml, mount read-only, ship. Highlights: - /mailboxes, /inbox, per-mailbox IMAP + SMTP endpoints - /mcp streamable-HTTP transport for agent integration - Multi-token bearer auth with constant-time comparison - Thunderbird MUA masquerade for self-send deliverability