Gmail Phishing Triage with Gemini AI + Sheets Logging (n8n Workflow)

Automatically triage Gmail messages with Gemini AI—and log every phishing check to Google Sheets

This n8n workflow monitors your Gmail inbox for new unread emails, uses a Google Gemini AI agent to categorize each message (including phishing/fraud detection), applies the correct Gmail label automatically, and appends the result to Google Sheets with sender, subject, category, and timestamp.

What this workflow does

• Checks Gmail every minute for new unread emails.
• Loads existing Gmail labels from the connected account and matches the five category label names to their Gmail label IDs.
• Sends each email’s subject, sender, and preview text to a Google Gemini-powered AI agent.
• The AI chooses exactly one category: ⚠️ Possible Fraud, 🔴 Urgent, 📢 Ads, 🔎 Review, or ⚪ Not Important.
• Applies the selected category as a Gmail label to the original email using the matching label ID.
• Logs the outcome to Google Sheets by appending a row with the email details, the AI’s category, and a timestamp (classified_at).

Use cases

• SaaS security triage: automatically label and route potentially fraudulent emails for faster review.
• Operations inbox management: separate urgent and non-urgent messages without manual sorting.
• Automation engineers: create an auditable Gmail classification pipeline with AI + logging for monitoring and iteration.
• Teams receiving marketing volume: label Ads vs. messages that need human attention (Review).

Technical details

• n8n nodes/workflow components: set, code, gmail, merge, gmail tool, sticky note.
• Integrations: Gmail (watch inbox, list labels, apply labels), Google Gemini (chat model for classification), Google Sheets (append classification rows).
• Required Gmail labels (exact names): ⚠️ Possible Fraud, 🔴 Urgent, 📢 Ads, 🔎 Review, ⚪ Not Important.
• Google Sheets setup: provide the spreadsheet ID and sheet/tab name in “Set log sheet details”, and ensure columns/headers for subject, from, category, and classified_at.