An AI-powered Gmail automation built with n8n and OpenAI that automatically classifies incoming emails and applies the correct Gmail label.

The system replaces manual inbox sorting with real-time AI classification, helping teams organize high-volume email and surface important messages faster.

The inbox contained multiple types of business communication, including sponsorships, collaborations, business inquiries, and general messages.

Manually reviewing and labeling incoming emails took 3+ hours per day, while inconsistent sorting increased the risk of delayed or missed opportunities.

I designed an automated n8n email classification workflow that monitors Gmail in real time, analyzes each incoming message with OpenAI, and applies the appropriate Gmail label automatically.

Gmail detects a new incoming email.

The workflow extracts the subject, body, sender, and relevant metadata.

OpenAI analyzes the message content, intent, and sender context.

The AI assigns one of four predefined categories:

n8n routes the result through conditional branches.

The corresponding Gmail label is applied automatically.

Optional logging can store classification results for reporting and auditing.

Each category uses a defined classification prompt so the AI follows consistent business rules.

An Others fallback category captures messages that do not match the predefined business categories, preventing unclassified emails from being left behind.

The labeling structure can also be adapted for different businesses, such as sales, support, partnerships, recruitment, billing, or operations.

3+ hours/day of manual inbox sorting eliminated

Real-time classification of incoming emails

Consistent automated labeling

Reduced risk of important messages being overlooked

Flexible category structure for future business requirements

Designed to scale to approximately 100–500 emails/day

n8n — workflow orchestration

OpenAI — AI-powered email classification

Gmail API — email monitoring and label management

JavaScript — data processing and workflow logic

Webhooks — event-driven automation

Build Type: Self-initiated demonstration build Role: Workflow Automation Engineer Platform: n8n Industry: Business Operations / Email Management