Auto-reply to emails using Google Gemini AI and SendGrid

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1. Workflow Overview

Transform your inbox into an intelligent assistant! This workflow automatically reads incoming emails, generates personalized AI responses using Google Gemini, and sends professional replies—all on...

Best for

Ticket Management automation workflows
AI Chatbot automation workflows
intermediate n8n builders looking for reusable templates

Tools used

n8n-nodes-base.stickynote, @n8n/n8n-nodes-langchain.lmchatgooglegemini, @n8n/n8n-nodes-langchain.memorybufferwindow, n8n-nodes-base.wait, n8n-nodes-base.set, n8n-nodes-base.if, n8n-nodes-base.sendgrid, @n8n/n8n-nodes-langchain.agent

Source and attribution

This workflow is cataloged by N8N Workflows and links back to its original n8n.io source page by Gilbert Onyebuchi.

Original n8n.io source

1.1 Workflow description

Title: Auto-reply to emails using Google Gemini AI and SendGrid
Workflow name: Auto-reply to emails using Google Gemini AI and SendGrid

How It Works:

Monitors Your Inbox - IMAP trigger checks for new emails
Smart Processing - Filters and validates incoming messages
AI Response - Google Gemini generates contextual, professional replies with conversation memory
Auto-Send - SendGrid delivers your response instantly

Perfect For:

B2B customer support automation
Lead qualification and response
FAQ handling
After-hours email coverage
Reducing response time from hours to seconds

Quick Setup (5 minutes):

Add your IMAP email credentials
Get free Google Gemini API key from aistudio.google.com
Configure SendGrid (or use any SMTP provider)
Customize AI prompt for your business
Activate and let it run!

Cost-Effective:

Google Gemini: Free tier available
SendGrid: Free up to 100 emails/day
Perfect for startups and small businesses

Customizable: Easily modify the AI prompt, add business logic, integrate with your CRM, or adjust response timing. The workflow is fully documented and beginner-friendly.

Need help customizing this for your specific use case? Looking for a collaborator on your n8n automation project?

Let's connect on LinkedIn: Send me a connection I'm always open to collaborating on innovative automation solutions! 🤝

#email-automation #ai-chatbot #customer-support #gemini #sendgrid #b2b

1.2 Logical Blocks

This catalog entry is organized from the workflow JSON. The node-level section below shows the executable blocks available for review before importing the template.

2. Block-by-Block Analysis

Block 1 - Setup Instructions

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 2 - Google Gemini Chat Model

Type / Role: @n8n/n8n-nodes-langchain.lmChatGoogleGemini - lmChatGoogleGemini
Config choices: Version 1

Block 3 - Simple Memory

Type / Role: @n8n/n8n-nodes-langchain.memoryBufferWindow - memoryBufferWindow
Config choices: Version 1.3

Block 4 - Sticky Note

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 5 - Sticky Note1

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 6 - Pause for 20 seconds

Type / Role: n8n-nodes-base.wait - wait
Config choices: Version 1.1

Block 7 - Set your details

Type / Role: n8n-nodes-base.set - set
Config choices: Version 3.4

Block 8 - Check if email exists

Type / Role: n8n-nodes-base.if - if
Config choices: Version 1

Block 9 - Send reply email

Type / Role: n8n-nodes-base.sendGrid - sendGrid
Config choices: Version 1

Block 10 - Generate reply email

Type / Role: @n8n/n8n-nodes-langchain.agent - agent
Config choices: Version 3

Block 11 - Read incoming emails

Type / Role: n8n-nodes-base.emailReadImap - emailReadImap
Config choices: Version 2

3. Summary Table

Workflow	Auto-reply to emails using Google Gemini AI and SendGrid
Complexity	intermediate
Nodes	11
Categories	Ticket Management, AI Chatbot
Author	Gilbert Onyebuchi
Published	04 Jan 2026

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/12460/12460.json as the source template for this automation.
2. Import the template into n8n

Open n8n, import the downloaded JSON, and review each node before activating the workflow.
3. Configure credentials and variables

Replace placeholder credentials, API keys, webhook URLs, account IDs, and environment-specific values with your own settings.
4. Test with sample data

Run the workflow manually or in a staging workspace, inspect node output, and confirm downstream systems receive the expected data.
5. Activate and monitor

Enable the workflow only after testing, then monitor executions, errors, and rate limits during the first production runs.

5. General Notes & Resources

Review imported nodes carefully before activation. This catalog entry is intended to help you inspect the workflow structure, understand required services, and find related templates faster.

Node names, credentials, schedules, webhook paths, and external service limits may need adjustment for your workspace.

Download workflow JSON Original n8n.io source Ticket Management workflows AI Chatbot workflows

Frequently asked questions

What does Auto-reply to emails using Google Gemini AI and SendGrid do?

What do I need before importing this workflow?

Review the workflow JSON, configure any required credentials in n8n, and test the automation in a safe workspace before using it in production.

Can I customize this workflow?

Yes. Use the block-by-block analysis and the downloadable JSON to inspect each node, then adjust credentials, prompts, schedules, filters, or destinations for your Ticket Management, AI Chatbot use case.

Gilbert Onyebuchi

12 workflows

Nodes

n8n-nodes-base.stickynote @n8n/n8n-nodes-langchain.lmchatgooglegemini @n8n/n8n-nodes-langchain.memorybufferwindow n8n-nodes-base.wait n8n-nodes-base.set n8n-nodes-base.if n8n-nodes-base.sendgrid @n8n/n8n-nodes-langchain.agent

Complexity

intermediate

Published 04 Jan 2026

Likes 0

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Install path: /data/workflows/12460/12460.json

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Auto-reply to emails using Google Gemini AI and SendGrid

Workflow preview

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Setup Instructions

Block 2 - Google Gemini Chat Model

Block 3 - Simple Memory

Block 4 - Sticky Note

Block 5 - Sticky Note1

Block 6 - Pause for 20 seconds

Block 7 - Set your details

Block 8 - Check if email exists

Block 9 - Send reply email

Block 10 - Generate reply email

Block 11 - Read incoming emails

3. Summary Table

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

2. Import the template into n8n

3. Configure credentials and variables

4. Test with sample data

5. Activate and monitor

5. General Notes & Resources

Frequently asked questions