Classify and auto-reply to Gmail with OpenAI, Google Sheets RAG and Telegram

📨 Gmail Classifier —Classify emails using AI and automate responses

This workflow delivers a complete, enterprise-grade Gmail automation system designed for high-volume teams. It classifies incoming emails, applies labels, generates AI-powered responses, and routes messages to the right department. It also includes optional demo email generation and an inbox cleanup utility so teams can test the workflow instantly.

🚀 What This Workflow Does

• Classifies Gmail messages into High Priority, Customer Support, Promotions, or Finance/Billing
• Generates AI-written replies or drafts based on category
• Applies Gmail labels automatically
• Uses RAG from Google Sheets for Support queries
• Sends real-time internal notifications (Telegram)
• Includes tools to generate & delete test emails for repeatable QA

🏢 Who This Is For

Teams that want reliable, automated inbox management:

• Customer Support
• Sales
• Billing & Finance
• Operations
• Solo founders who need executive inbox automation
• AI-powered enterprise workflows using Gmail

🧩 Internal Workflow Overview

1. Gmail Trigger pulls unread emails from the inbox
2. Email Classifier Agent (OpenAI) cleans + classifies the email
3. Switch Node routes to the correct workflow lane
4. Labels are added → AI responders generate the message → internal teams get notified
5. Optional: Demo email generator + inbox cleanup for testing

🛠️ How to Set Up

1. Add credentials:
   • Gmail OAuth2
   • OpenAI / Gemini
   • Google Sheets OAuth2
2. Copy the demo sheet:
   https://docs.google.com/spreadsheets/d/1A959skQt0a7RbdsD0IGaCbPxMv4a-HjmQL4hwB9TcXc/edit?usp=sharing
3. Update the Google Sheets nodes with your Document ID + Sheet Name
4. Enable Gmail Trigger (UNREAD filter recommended)
5. Use “Send Demo Emails” → test end-to-end behavior
6. Run the Gmail Classifier workflow live

📦 Requirements

• Gmail API access
• OpenAI/Gemini API key
• Google Sheets OAuth (for RAG/lookup)
• n8n (latest recommended version)

🎯 Ideal Enterprise Use Cases

• Automated customer support with AI-written replies
• High-priority routing for executives
• Finance & billing summarization for operations
• Filtering promotions/marketing noise from shared inboxes
• AI-augmented helpdesk workflows

🧪 Test Data Included

Use the Demo Sheet tabs:

• Sample_Emails → pre-written emails for every category
• Demo_Emails → rows sent as live test emails

Copy → paste → run.

🔖 Tags

Gmail, AI, Inbox Automation, Support Automation, Enterprise, Email Classification, OpenAI, RAG, Google Sheets

Template Author: Sandeep Patharkar
LinkedIn: https://www.linkedin.com/in/sandeeppatharkar
Skool: https://www.skool.com/aic-plus