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This n8n workflow automates the handling of incoming emails. It detects and filters out spam, searches a knowledge base (FAQ) stored in a Pinecone vector database, and sends a reply using Gmail — all powered by an AI model (GPT-4o mini).
How It Works
- Receiving Emails
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The Gmail Trigger node checks a Gmail inbox every hour.
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When a new email arrives, it starts the workflow.
- Fetching Full Email Content
- The get_message node retrieves all the details of the message: sender, subject, text, message ID, etc.
- Spam Filtering
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The Spam checker node uses GPT-4o mini to classify the email as either "spam" or "no spam".
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It detects not only classic spam but also automated messages (e.g. from Google or Microsoft).
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If marked as "spam", the workflow ends and nothing is processed.
- Conditional Filter
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The If node checks the spam result.
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Only "no spam" emails proceed to the AI Agent.
- AI-Based Reply
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The AI Agent node generates a response based on:
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The email content
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A system prompt defining the assistant’s behavior (polite, professional, under the name “Total AI Solutions”)
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Information retrieved from the Pinecone Vector Store, which contains FAQs
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The AI is instructed to always check the vector store before replying.
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The AI prepares both the subject and the body of the reply.
- Sending the Reply
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The Gmail node sends the reply to the original sender.
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It uses the original email's ID to keep the thread intact.
- Language Model
- The OpenAI Chat Model node provides GPT-4o mini as the language engine for generating responses.
- Memory Support
- The Simple Memory node maintains short-term context, helpful in multi-turn conversations.
- Knowledge Base (FAQ)
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The Pinecone Vector Store node connects to a Pinecone index (faqmattabott) containing vectorized FAQ content.
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Vectors are created using the Embeddings OpenAI node.