inboxmcp is now available

Background

A connection between AI assistants and classic email mailboxes was, until now, not available. Users of mailbox.org, IONOS, STRATO, Posteo or self-hosted Plesk installations had no direct path into modern AI applications.

Whether and when individual mail providers will ship their own MCP integrations is open. The functional scope of any such integration is equally unclear and depends on each provider’s priorities. A universal MCP server such as inboxmcp covers every IMAP mailbox uniformly: the same functionality regardless of provider.

What inboxmcp does

inboxmcp is the connecting layer between IMAP mailboxes and AI assistants. Any AI application that supports the open Model Context Protocol can access the mailbox through it. Claude is supported today as a Custom Connector. ChatGPT, Gemini and Microsoft Copilot will follow once their providers integrate MCP.

Current functionality

With inboxmcp, the AI can read, search and summarise messages, save drafts in the mailbox, manage folders and move messages between folders. Multiple mailboxes can be managed under a single account.

Technical points

The servers are located in Frankfurt. Mail content is not stored. When the AI issues a request, the required data is fetched from the IMAP server on demand, forwarded, and not retained. Credentials are encrypted with AES-256-GCM. The service that accepts new credentials has no access to the decryption key. The key resides only in the isolated worker that establishes the IMAP connection.

Getting started

Create an account at app.inboxmcp.io, add a mailbox, enter the connector URL in Claude. The setup takes a few minutes.

Outlook

In development:

• Sending messages.
• Marking messages as read, unread, starred or important.
• Moving messages to the trash.

Feedback is welcome at hi@inboxmcp.io.