Automation library · AI assistants

Auto-email response system with OpenAI and Gmail

Started by an arriving email, and works across Gmail. It hands the judgement calls to OpenAI. 11 steps, 1 branch: a working afternoon to understand properly.

MediumCalls a model: OpenAI

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11 stepsMedium: a working afternoon
1Branch: places the flow splits
0Loops or waits
1Service it connects to

The flow

Starts it 1Model 5Logic 2Service 3

The steps in the order they run, from what starts it.

  1. 1OpenAI GPT-4.1-miniLm Chat Open AiModel
  2. 2Gmail TriggerGmail triggerStarts it
  3. 3Check Feedback1Text ClassifierModel
  4. 4Get a messageGmailService
  5. 5Send ReplyGmailService
  6. 6Revision Agent1Open AiModel
  7. 7Email Relevance DeterminationOpen AiModel
  8. 8Set Email1SetLogic
  9. 9Relevant?IfLogic
  10. 10Human Approval RequestGmailService
  11. 11Craft Reply DraftOpen AiModel

How it's built

Starts on
An arriving email
Steps
11, with 1 branch
Size
Medium: a working afternoon
Connects to
Gmail
Model
OpenAI

Questions

What does it need to run?

An n8n account, plus your own Gmail account, and a key for OpenAI. You connect your own accounts after importing it; none are included.

What starts it?

It starts on an arriving email.

Does it use AI?

Yes. It calls OpenAI. Model calls are billed by the provider, not by n8n.

How long does it take to set up?

Plan an afternoon. 11 steps is enough that you should read each one before running it.

How do I import it?

Copy the workflow, open a new workflow in n8n and paste. The steps appear on the canvas, ready for your own accounts.

Before you run it

Nothing here has been tested by us. It is somebody's working automation, read and described from its own steps. Treat the connections it wants as a list of accounts it will touch, and read the 11 steps before you point it at anything that matters.