Send AI job application auto-replies with Gmail, OpenAI GPT-4o and SMTP

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1. Workflow Overview

This workflow automatically replies to job applications received via email using AI. It monitors a Gmail inbox for incoming job application emails, filters relevant messages, and uses an AI agent t...

Best for

HR automation workflows
AI Chatbot automation workflows
advanced n8n builders looking for reusable templates

Tools used

n8n-nodes-base.gmailtrigger, @n8n/n8n-nodes-langchain.lmchatopenai, @n8n/n8n-nodes-langchain.agent, n8n-nodes-base.set, @n8n/n8n-nodes-langchain.outputparserstructured, n8n-nodes-base.emailsend, n8n-nodes-base.if, n8n-nodes-base.noop

Source and attribution

This workflow is cataloged by N8N Workflows and links back to its original n8n.io source page by Md Abdullah Al Noman.

Original n8n.io source

1.1 Workflow description

Title: Send AI job application auto-replies with Gmail, OpenAI GPT-4o and SMTP
Workflow name: Send AI job application auto-replies with Gmail, OpenAI GPT-4o and SMTP

This workflow automatically replies to job applications received via email using AI.

It monitors a Gmail inbox for incoming job application emails, filters relevant messages, and uses an AI agent to generate professional and personalized responses.

The workflow then sends the reply back to the applicant using SMTP.

Key Features:

Detects job application emails automatically
Uses AI to generate professional HR responses
Structured output parsing for reliable responses
Sends replies using your company email
Fully automated hiring response system

Perfect for HR teams, startups, and recruiters who want to automate candidate communication.

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 - Gmail Trigger

Type / Role: n8n-nodes-base.gmailTrigger - gmailTrigger
Config choices: Version 1.3

Block 2 - OpenAI Chat Model

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

Block 3 - AI Agent

Type / Role: @n8n/n8n-nodes-langchain.agent - agent
Config choices: Version 3.1

Block 4 - Edit Fields

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

Block 5 - Structured Output Parser

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

Block 6 - Send an Email

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

Block 7 - If

Type / Role: n8n-nodes-base.if - if
Config choices: Version 2.3

Block 8 - No Operation, do nothing

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

Block 9 - Sticky Note

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

Block 10 - Sticky Note1

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

Block 11 - Sticky Note2

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

Block 12 - Sticky Note3

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

Block 13 - Sticky Note4

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

Block 14 - Sticky Note5

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

Block 15 - Sticky Note6

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

Block 16 - Sticky Note7

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

Block 17 - Sticky Note8

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

3. Summary Table

Workflow	Send AI job application auto-replies with Gmail, OpenAI GPT-4o and SMTP
Complexity	advanced
Nodes	17
Categories	HR, AI Chatbot
Author	Md Abdullah Al Noman
Published	23 Mar 2026

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/14267/14267.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 HR workflows AI Chatbot workflows

Frequently asked questions

What does Send AI job application auto-replies with Gmail, OpenAI GPT-4o and SMTP 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 HR, AI Chatbot use case.

Md Abdullah Al Noman

1 workflow

Nodes

n8n-nodes-base.gmailtrigger @n8n/n8n-nodes-langchain.lmchatopenai @n8n/n8n-nodes-langchain.agent n8n-nodes-base.set @n8n/n8n-nodes-langchain.outputparserstructured n8n-nodes-base.emailsend n8n-nodes-base.if n8n-nodes-base.noop

Complexity

advanced

Published 23 Mar 2026

Likes 0

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Install path: /data/workflows/14267/14267.json

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Send AI job application auto-replies with Gmail, OpenAI GPT-4o and SMTP

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 - Gmail Trigger

Block 2 - OpenAI Chat Model

Block 3 - AI Agent

Block 4 - Edit Fields

Block 5 - Structured Output Parser

Block 6 - Send an Email

Block 7 - If

Block 8 - No Operation, do nothing

Block 9 - Sticky Note

Block 10 - Sticky Note1

Block 11 - Sticky Note2

Block 12 - Sticky Note3

Block 13 - Sticky Note4

Block 14 - Sticky Note5

Block 15 - Sticky Note6

Block 16 - Sticky Note7

Block 17 - Sticky Note8

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