Automate sponsored deal email responses with Gmail and GPT-4

Automate Sponsored Deal Emails with n8n + AI 🚀

Managing inbound emails can be exhausting — especially when your inbox is flooded with sponsored deal requests that don’t always fit your brand. Manually reading, filtering, and politely declining each one eats up valuable time.

That’s why I built a smart n8n workflow that automatically: - Detects sponsored deal inquiries, - Decides if they match my criteria, - Drafts a professional, courteous reply, - Or simply ignores irrelevant messages.

The best part? It runs on autopilot. Let’s break down every single node in this workflow.

🔔 1. Gmail Trigger – “Your Inbox Watchdog” - Polls your Gmail inbox every minute. - Detects new emails instantly. - Hands over each email to the next step for analysis.

✂️ 2. Edit Fields (Set Node) – “Extract the Essentials” - Pulls out the most important parts of the email: - From → Sender’s email address - Subject → The email subject line - Email Body → The main text content - Keeps data structured and ready for AI to process.

🧠 3. AI Agent – “The Smart Classifier” - Powered by LangChain + OpenAI. - Reads the email content carefully. - Outputs two things: - isSponsoredEmail → true/false - reason → why it decided that way - Example: json { "isSponsoredEmail": true, "reason": "The email mentions a paid collaboration opportunity." }

- Structured Output Parser – “Keep It Clean”