Gmail Email Categorization & Auto Reply with GPT-4o and Google Sheets

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🧭 Description This section automates Gmail message handling through AI-powered classification and response. Using the LangChain Text Classifier, incoming emails are analyzed and sorted into four categories — High Priority, Advertisement, Inquiry, and Finance/Billing — each triggering a dedicated action flow. High Priority: AI generates a professional draft reply and saves it to Gmail. Advertisement: AI summarizes content and logs it to Google Sheets. Inquiry: AI composes a customer-friendly