n8n Workflow: Gmail IMAP Email Review & AI Reply with Qdrant

Review incoming emails and generate approval-ready AI replies—automatically

This n8n workflow monitors your inbox via IMAP, summarizes new messages with DeepSeek, drafts a concise response using an OpenAI agent powered by Qdrant, and routes the result through a Gmail “send and wait” human approval step. If you approve, it replies via SMTP; if not, it revises the email based on your feedback.

What this workflow does

• Receives a new incoming email from an IMAP inbox you configure.
• Converts the email HTML into Markdown and summarizes the message with DeepSeek.
• Uses an OpenAI agent with a Qdrant retrieval tool to draft a concise reply using your company knowledge base.
• Sends the original email and the AI draft to a designated Gmail address using “send and wait” to collect human feedback.
• Classifies feedback with OpenAI as Approved or Declined.
• If approved, sends the drafted reply back to the original sender via SMTP.
• If declined, rewrites the email using an OpenAI “reviewer” agent based on the feedback, and sends it back for approval again.

Use cases

• Customer support triage: summarize inbound questions and propose a response that’s reviewed by a team member.
• Sales follow-ups: draft concise replies grounded in your Qdrant knowledge base, then send only after approval.
• Operations communication: speed up routine email replies while keeping a human in the loop.

Technical details

• IMAP for reading new messages; SMTP for sending replies.
• Gmail OAuth2 integration required for “send and wait for response” approval workflow.
• Markdown conversion of email HTML before summarization.
• DeepSeek for summarizing inbound email content (optional, if you choose to enable it).
• OpenAI for draft/rewrite and feedback classification.
• Qdrant as a knowledge base (URL, API key, collection name; ingestion from a specified Google Drive folder via the manual setup flow).
• Workflow components include: set, gmail, markdown, and email send elements.