Reply to contact form leads via Gmail and Google Sheets using OpenAI GPT-4o mini

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1. Workflow Overview

Quick overview This workflow triggers on n8n form submissions, uses OpenAI (GPT 4o mini) to draft a short acknowledgment email, sends the auto reply through Gmail, and appends the submission detail...

Best for

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

Tools used

n8n-nodes-base.stickynote, n8n-nodes-base.formtrigger, @n8n/n8n-nodes-langchain.chainllm, @n8n/n8n-nodes-langchain.lmchatopenai, n8n-nodes-base.gmail, n8n-nodes-base.googlesheets

Source and attribution

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

Original n8n.io source

1.1 Workflow description

Title: Reply to contact form leads via Gmail and Google Sheets using OpenAI GPT-4o mini
Workflow name: Reply to contact form leads via Gmail and Google Sheets using OpenAI GPT-4o mini

Quick overview

This workflow triggers on n8n form submissions, uses OpenAI (GPT-4o mini) to draft a short acknowledgment email, sends the auto-reply through Gmail, and appends the submission details to a Google Sheets spreadsheet.

How it works

Triggers when someone submits the n8n “Contact Us” form with their name, email, and message.
Sends the submission text to OpenAI (GPT-4o mini) to generate a warm auto-reply that promises a human follow-up within one business day.
Sends the generated reply to the submitter via Gmail with the subject “Thanks for reaching out!”.
Appends the form submission data to a Google Sheets worksheet for tracking.

Setup

Connect an OpenAI credential for the Chat model used to generate the email reply.
Connect a Gmail account credential and confirm the workflow is allowed to send email from that mailbox.
Connect a Google Sheets credential, replace the spreadsheet URL/ID in the Google Sheets step, and ensure the target sheet tab is named “Leads” (or update it to match your sheet).

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 - Sticky Note

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

Block 2 - Sticky Note1

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

Block 3 - Sticky Note2

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

Block 4 - Sticky Note3

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

Block 5 - When Form Submitted

Type / Role: n8n-nodes-base.formTrigger - formTrigger
Config choices: Version 2.2

Block 6 - Prepare Email Reply

Type / Role: @n8n/n8n-nodes-langchain.chainLlm - chainLlm
Config choices: Version 1.5

Block 7 - OpenAI GPT-4o Mini

Type / Role: @n8n/n8n-nodes-langchain.lmChatOpenAi - lmChatOpenAi
Config choices: Version 1.2

Block 8 - Send Email via Gmail

Type / Role: n8n-nodes-base.gmail - gmail
Config choices: Version 2.1

Block 9 - Append to Google Sheets

Type / Role: n8n-nodes-base.googleSheets - googleSheets
Config choices: Version 4.5

3. Summary Table

Workflow	Reply to contact form leads via Gmail and Google Sheets using OpenAI GPT-4o mini
Complexity	intermediate
Nodes	9
Categories	Ticket Management, AI Summarization
Author	TakatoYamada
Published	30 May 2026

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/16021/16021.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 Summarization workflows

Frequently asked questions

What does Reply to contact form leads via Gmail and Google Sheets using OpenAI GPT-4o mini 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 Summarization use case.

TakatoYamada

14 workflows

Nodes

n8n-nodes-base.stickynote n8n-nodes-base.formtrigger @n8n/n8n-nodes-langchain.chainllm @n8n/n8n-nodes-langchain.lmchatopenai n8n-nodes-base.gmail n8n-nodes-base.googlesheets

Complexity

intermediate

Published 30 May 2026

Likes 0

View on n8n.io Download Workflow

Install path: /data/workflows/16021/16021.json

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Reply to contact form leads via Gmail and Google Sheets using OpenAI GPT-4o mini

Workflow preview

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

Quick overview

How it works

Setup

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Sticky Note

Block 2 - Sticky Note1

Block 3 - Sticky Note2

Block 4 - Sticky Note3

Block 5 - When Form Submitted

Block 6 - Prepare Email Reply

Block 7 - OpenAI GPT-4o Mini

Block 8 - Send Email via Gmail

Block 9 - Append to Google Sheets

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