n8n Workflow: Automated Post-Purchase Emails for Gumroad with Notion CRM and Gemini AI

This n8n workflow automates the process of sending personalized post-purchase emails to Gumroad customers, managing them in a Notion CRM, and leveraging Gemini AI for email content generation.

What it does

This workflow is triggered manually and is designed to:

1. Start Manually: The workflow is initiated manually.
2. Trigger by Gmail: It listens for new emails in Gmail that match specific criteria (e.g., Gumroad purchase notifications).
3. Filter Emails: It uses an "If" node to filter incoming emails, likely checking for keywords or sender addresses to confirm they are Gumroad purchase emails.
4. Extract Data with Code: A "Code" node processes the email content to extract relevant information about the purchase and customer.
5. Generate Email Content with AI: An "AI Agent" node, utilizing the "Google Gemini Chat Model," generates a personalized post-purchase email based on the extracted data.
6. Update Notion CRM: It creates or updates an entry in a Notion database with the customer and purchase details, including the generated email content.
7. Send Personalized Email: Finally, it sends the AI-generated personalized email to the customer via Gmail.
8. Handle Errors: If any critical step fails, the "Stop and Error" node will halt the workflow and report an error.

Prerequisites/Requirements

To use this workflow, you will need:

• n8n Instance: A running n8n instance.
• Gmail Account: Connected to n8n with appropriate credentials to read incoming Gumroad purchase emails and send outgoing emails.
• Notion Account: Connected to n8n with access to a CRM database where customer and purchase information will be stored.
• Google Gemini API Key: For the "Google Gemini Chat Model" to generate email content.
• Gumroad Purchase Notifications: Ensure your Gumroad account is configured to send purchase notifications to the monitored Gmail address.

Setup/Usage

1. Import the Workflow: Download the provided JSON and import it into your n8n instance.
2. Configure Credentials:
   • Gmail: Set up your Gmail OAuth2 credentials for both the Gmail Trigger and Gmail nodes. Ensure the credentials have permissions to read emails and send emails.
   • Notion: Set up your Notion API credentials. Ensure the integration has access to the specific Notion database you intend to use as your CRM.
   • Google Gemini: Configure your Google Gemini API key within the Google Gemini Chat Model node.
3. Customize Nodes:
   • Gmail Trigger: Adjust the "Query" field to specifically target your Gumroad purchase notification emails (e.g., from:noreply@gumroad.com subject:"New sale").
   • If Node: Refine the conditions in the If node to accurately filter for valid Gumroad purchase emails if the Gmail trigger alone isn't sufficient.
   • Code Node: Modify the JavaScript code to correctly parse the specific structure of your Gumroad purchase notification emails and extract details like customer name, product name, and purchase amount.
   • AI Agent / Google Gemini Chat Model: Customize the prompt in the AI Agent node to guide Gemini in generating the desired tone and content for your post-purchase emails.
   • Notion Node: Map the extracted data to the correct properties in your Notion CRM database.
   • Gmail Node: Configure the "To," "Subject," and "Body" fields using expressions to dynamically insert customer and product details, along with the AI-generated email content.
4. Activate the Workflow: Once configured, activate the workflow. It will now run automatically based on the Gmail trigger.
5. Test Thoroughly: Perform test purchases on Gumroad (or simulate emails) to ensure the workflow processes correctly, sends the right emails, and updates Notion as expected.