Postgate AI
DE

7-day free trial

Experience Postfach-KI in your own mailbox

Connect Claude, ChatGPT & Co. to your on-premises Exchange - in the chat interface you already use, on desktop and mobile. With your real emails, calendar and contacts. No credit card, ends automatically.

  • In your AI assistant: Claude, ChatGPT and any other MCP-capable client - no new interface to learn
  • Your data stays in your Exchange - access only with each user’s own permissions
  • Hosted in Germany, GDPR-compliant, no data used for training
  • Optional extra: add-in right inside Outlook, installed via manifest URL - no client rollout

What you need

  • Exchange Server with EWS (Exchange Web Services), reachable from the internet - at least for our server IP
  • An AI assistant with MCP support (e.g. Claude or ChatGPT); for the optional Outlook add-in, an Exchange administrator runs a one-line PowerShell command (provided in the portal)
  • No Microsoft 365 required: users sign in with their Exchange account
or
Continue with Microsoft

How it works

From sign-up to your first prompt

  1. 01Sign upCreate your account, confirm your email - your organization is set up.
  2. 02Configure the basicsSet up the Exchange connection (EWS URL), sign the data processing agreement (DPA), add users - no payment method needed until after the trial.
  3. 03Invite colleaguesCopy the invitation link or send it by email - colleagues register themselves.
  4. 04Pair your AI assistantConnect Postfach-KI in Claude, ChatGPT & Co. - everyone with their own mailbox.
  5. 05GoWork with your mailbox in the chat you already use - on desktop and mobile.
portal.postfach-ki.de

Postfach-KI Portal

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