AI Email Responder with RAG & Human Approval

Unlock intelligent email automation with this AI Agent

This workflow creates a powerful AI Email Responder. It monitors an inbox, summarizes new emails, and then uses a Retrieval-Augmented Generation (RAG) approach to draft accurate, context-aware responses. The agent queries your private knowledge base (powered by Qdrant and OpenAI embeddings) to find relevant information. Before any email is sent, the draft is routed to a human for a quick review. The agent understands the feedback ('approved' or 'needs changes') and either sends the email or revises it based on your instructions.

Key Features & Benefits

• Retrieval-Augmented Generation (RAG): Drafts replies using information from your own documents, ensuring brand consistency and accuracy.
• Automated Summarization: Quickly understands the context of incoming emails with an AI-powered summarization step.
• Human-in-the-Loop: Integrates a seamless approval workflow. Drafts are sent for review, and the agent acts on the feedback.
• Intelligent Feedback Processing: Uses an AI classifier to interpret review feedback (e.g., 'Looks good, send it' vs. 'Please rephrase this part').
• Knowledge Base Ingestion: Includes a setup flow to easily vectorize your documents from Google Drive and populate your knowledge base.

• An n8n instance (Cloud or self-hosted).
• OpenAI API Key (e.g., for gpt-4o-mini).
• Qdrant instance URL and API Key.
• Credentials for your trigger email account (IMAP).
• Gmail credentials for the approval and sending steps.
• Google Drive credentials for knowledge base ingestion.

1. Import & Configure Credentials: Import the workflow and configure the credentials for OpenAI, Qdrant, IMAP, Gmail, and Google Drive in the Credentials section of your n8n instance.
2. Setup Knowledge Base (One-Time):
   • In the "Create collection" and "Refresh collection" HTTP nodes, replace QDRANTURL and COLLECTION with your Qdrant instance details.
   • In the "Get folder" node, point to the Google Drive folder containing your knowledge documents.
   • Manually run the "When clicking ‘Test workflow’" trigger once to build your initial knowledge base.
3. Configure Main Flow:
   • In the "Email Trigger (IMAP)" node, select your configured IMAP credential.
   • In the "Qdrant Vector Store" tool node, set your Qdrant collection name.
   • In the "Gmail" node (send for approval), set the sendTo email address to your reviewer's email.
   • In the final "Send Email" node, configure your SMTP credential.
4. Customize & Activate: Review the prompts in the AI Agent nodes ("Write email", "Email Reviewer") to match your desired tone and style. Activate the workflow.