Classify cold email replies and triage Gmail with Claude and Slack

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1. Workflow Overview

Quick Overview This workflow monitors Gmail for new email replies, uses Anthropic Claude to classify each reply and draft a suggested response, then routes interested replies to Slack and a Gmail d...

Best for

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

Tools used

n8n-nodes-base.stickynote, n8n-nodes-base.gmailtrigger, n8n-nodes-base.set, @n8n/n8n-nodes-langchain.chainllm, @n8n/n8n-nodes-langchain.lmchatanthropic, @n8n/n8n-nodes-langchain.outputparserstructured, n8n-nodes-base.switch, n8n-nodes-base.slack

Source and attribution

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

Original n8n.io source

1.1 Workflow description

Title: Classify cold email replies and triage Gmail with Claude and Slack
Workflow name: Classify cold email replies and triage Gmail with Claude and Slack

Quick Overview

This workflow monitors Gmail for new email replies, uses Anthropic Claude to classify each reply and draft a suggested response, then routes interested replies to Slack and a Gmail draft while labeling all other replies in Gmail for triage.

How it works

Triggers every minute when a new email reply is received in Gmail.
Loads configuration values such as your offer/voice context, Slack channel, and Gmail label IDs.
Sends the email details to Anthropic Claude to classify the reply, score confidence, summarize it, and draft a suggested response as structured JSON.
Routes the message by category so “interested” replies post an alert to Slack.
Creates a Gmail draft reply in the same thread using Claude’s suggested response.
For non-interested categories (not now, out of office, unsubscribe, referral, objection) and any unmatched output, adds the corresponding Gmail label to the incoming message.

Setup

Add credentials for Gmail OAuth2, Anthropic API, and Slack OAuth in the respective nodes.
Update the “Config (edit me)” values with your offer/voice context, Slack channel name, and the Gmail label IDs for each category (not_now, out_of_office, unsubscribe, referral, objection, and review).
Create the required Gmail labels and copy their label IDs into the config so each category is applied correctly.

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 - Overview

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

Block 2 - Sticky Note - Setup

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

Block 3 - Sticky Note - AI

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

Block 4 - Sticky Note - Route

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

Block 5 - New Email Reply

Type / Role: n8n-nodes-base.gmailTrigger - gmailTrigger
Config choices: Version 1.2

Block 6 - Config (edit me)

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

Block 7 - Classify Reply + Draft Response

Type / Role: @n8n/n8n-nodes-langchain.chainLlm - chainLlm
Config choices: Version 1.4

Block 8 - Anthropic Chat Model

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

Block 9 - Structured Output Parser

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

Block 10 - Route by Category

Type / Role: n8n-nodes-base.switch - switch
Config choices: Version 3

Block 11 - Notify Slack

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

Block 12 - Create Gmail Draft

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

Block 13 - Label Not Now

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

Block 14 - Label Out Of Office

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

Block 15 - Label Unsubscribe

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

Block 16 - Label Referral

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

Block 17 - Label Objection

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

Block 18 - Label Review

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

Block 19 - Sticky Note - Setup1

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

3. Summary Table

Workflow	Classify cold email replies and triage Gmail with Claude and Slack
Complexity	advanced
Nodes	19
Categories	Ticket Management, AI Summarization
Author	Keith Uy
Published	11 Jun 2026

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/16289/16289.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 Classify cold email replies and triage Gmail with Claude and Slack 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.

Keith Uy

7 workflows

Nodes

n8n-nodes-base.stickynote n8n-nodes-base.gmailtrigger n8n-nodes-base.set @n8n/n8n-nodes-langchain.chainllm @n8n/n8n-nodes-langchain.lmchatanthropic @n8n/n8n-nodes-langchain.outputparserstructured n8n-nodes-base.switch n8n-nodes-base.slack

Complexity

advanced

Published 11 Jun 2026

Likes 0

View on n8n.io Download Workflow

Install path: /data/workflows/16289/16289.json

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Classify cold email replies and triage Gmail with Claude and Slack

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 - Overview

Block 2 - Sticky Note - Setup

Block 3 - Sticky Note - AI

Block 4 - Sticky Note - Route

Block 5 - New Email Reply

Block 6 - Config (edit me)

Block 7 - Classify Reply + Draft Response

Block 8 - Anthropic Chat Model

Block 9 - Structured Output Parser

Block 10 - Route by Category

Block 11 - Notify Slack

Block 12 - Create Gmail Draft

Block 13 - Label Not Now

Block 14 - Label Out Of Office

Block 15 - Label Unsubscribe

Block 16 - Label Referral

Block 17 - Label Objection

Block 18 - Label Review

Block 19 - Sticky Note - Setup1

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