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Automatic email classification with Gmail and Claude AI

Ayis Saliaris FasseasAyis Saliaris Fasseas
287 views
2/3/2026
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How It Works 1.Gmail Trigger

  • Continuously monitors your Gmail inbox for new messages.
  • Captures the email’s subject, body, and metadata.
  • Sends the extracted content to the Email Content Classifier.

2.Email Content Classification

The Email Content Classifier analyzes the email content using natural language processing.

Compares the message against predefined Gmail labels:

  • Ads
  • Work
  • Personal
  • Financial
  • Other (fallback label)

Users can add or rename categories to match their specific needs.

Uses context, tone, and keywords to determine the most accurate label.

3.Applying Gmail Labels

  • Sends the classification result to the corresponding Gmail label node.
  • Automatically applies the matching Gmail label in your inbox.
  • If the classifier cannot confidently match the message, the Other label is used as a fallback.

Setup Steps

  • Connect Gmail Accounts
  • Connect your Gmail account in the Gmail Trigger and in each Gmail label node.
  • Configure the Email Content Classifier
  • Map the incoming Gmail message body to inputText.
  • Ensure the classifier node has access to a language model credential (Anthropic or other).
  • Test the Workflow
  • Send a few sample emails to yourself to confirm that labels are correctly applied.
  • Tweak Categories if Needed
  • Adjust category names in the classifier node to match your Gmail labels exactly.

Customization

  • Add or rename categories in the classifier to reflect your specific email types.
  • Create corresponding Gmail label nodes for each new category.
  • Expand or modify categories as your workflow evolves to improve organization and efficiency.

Use Cases

  • Automatic inbox organization and sorting.
  • Separation of work, personal, financial, and promotional emails.
  • Improved productivity by making important emails easier to locate.
  • Custom categorization for specialized workflows.

Troubleshooting Tips

  • Emails not being labeled → check API permissions and message ID references.
  • Wrong label assigned → update classifier examples or refine category descriptions.
  • Classifier not returning a category → confirm fallback category “Other” is configured.
  • Workflow not triggering → reconnect Gmail Trigger authentication and ensure the workflow is active.

Automatic Email Classification with Gmail and Claude AI

This n8n workflow automates the classification of incoming emails using Gmail as a trigger and Anthropic's Claude AI for intelligent text classification. It helps streamline email management by categorizing emails based on their content.

What it does

This workflow simplifies email management by:

  1. Monitoring Gmail: It listens for new emails arriving in your Gmail inbox.
  2. Extracting Email Content: Upon receiving a new email, it extracts the subject and body of the email.
  3. Classifying Email Content with AI: It sends the extracted email content to an Anthropic Claude AI model (via the Text Classifier node) to determine its category or intent.
  4. Processing Classified Emails: Although the current JSON doesn't specify subsequent actions, the classified emails are ready for further automation (e.g., moving to specific folders, sending notifications, updating a CRM, etc.).

Prerequisites/Requirements

To use this workflow, you will need:

  • n8n Instance: A running n8n instance.
  • Gmail Account: A Google account with Gmail enabled.
  • Anthropic API Key: An API key for Anthropic's Claude AI model to use the "Anthropic Chat Model" and "Text Classifier" nodes.
  • Gmail Credential: An n8n credential configured for your Gmail account.
  • Anthropic Credential: An n8n credential configured for your Anthropic API key.

Setup/Usage

  1. Import the Workflow:
    • Download the provided JSON file.
    • In your n8n instance, go to "Workflows" and click "New Workflow".
    • Click the "Import from JSON" button and paste the workflow JSON or upload the file.
  2. Configure Credentials:
    • Locate the "Gmail Trigger" node and configure your Gmail account credential.
    • Locate the "Anthropic Chat Model" and "Text Classifier" nodes and configure your Anthropic API key credential.
  3. Activate the Workflow:
    • Once credentials are set, save the workflow.
    • Toggle the workflow to "Active" to start listening for new emails.
  4. Customize Classification (Optional):
    • You can further configure the "Text Classifier" node to define specific categories or instructions for how Claude AI should classify your emails.
  5. Add Post-Classification Actions (Optional):
    • Extend the workflow by adding nodes after the "Text Classifier" to perform actions based on the classification result (e.g., use a "Switch" node to route emails to different "Gmail" actions like moving them to specific labels/folders, or sending data to other services).

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