# A very simple "Human in the Loop" email response system: n8n workflow

> Started by an arriving email, and works across Email. It hands the judgement calls to OpenAI. 10 steps, 1 branch: a working afternoon to understand properly.

Source: https://millionrounds.com/workflow/a-very-simple-human-in-the-loop-email-response-system (Millionrounds; every figure on the page links to its filing or article)

[Automation library](https://millionrounds.com/workflows) · [AI assistants](https://millionrounds.com/workflows?category=AI+assistants#library)

# A very simple "Human in the Loop" email response system

Started by an arriving email, and works across Email. It hands the judgement calls to OpenAI. 10 steps, 1 branch: a working afternoon to understand properly.

Medium Calls a model: OpenAI

[Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fa-very-simple-human-in-the-loop-email-response-system)

**10 steps** Medium: a working afternoon

**1** Branch: places the flow splits

**0** Loops or waits

**1** Service it connects to

## The flow

Model 4 Logic 3 Service 3

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

- 1 **Email Trigger (IMAP)** Email Read Imap *Service*
- 2 **OpenAI** Lm Chat Open Ai *Model*
- 3 **OpenAI Chat Model** Lm Chat Open Ai *Model*
- 4 **Markdown** Markdown *Logic*
- 5 **Write email** Agent *Model*
- 6 **Email Summarization Chain** Chain Summarization *Model*
- 7 **Set Email text** Set *Logic*
- 8 **Approve Email** Email Send *Service*
- 9 **Approved?** If *Logic*
- 10 **Send Email** Email Send *Service*

## How it's built

- **Starts on:** An arriving email
- **Steps:** 10, with 1 branch
- **Size:** Medium: a working afternoon
- **Connects to:** Email
- **Model:** OpenAI

## Questions

What does it need to run?

An n8n account, plus your own Email 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. 10 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 10 steps before you point it at anything that matters.

## Run it in n8n

- **Create your n8n account** Free to start. n8n is where the workflow runs. [Create an n8n account ↗](https://millionrounds.com/n8n)
- **Download the workflow** Free with a Millionrounds account. [Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fa-very-simple-human-in-the-loop-email-response-system)
- **Paste it into n8n** Open a new workflow in n8n and paste. Then connect your own accounts.

Stored with the author's traces removed: canvas notes, instance identifiers, saved credential names and any live document they had left behind.

## Connects to

Each opens the other workflows that use it.

[Email](https://millionrounds.com/workflows?service=Email#library)

## Workflows like it

Also ai assistants, with the same services where possible, closest in size first.

- [**A very simple _Human in the Loop_ email response system** 10 steps · calls a model · Email](https://millionrounds.com/workflow/a-very-simple-human-in-the-loop-email-response-system-2)
- [**Generate a personal newsfeed with Bright Data and OpenAI** 10 steps · calls a model · Email](https://millionrounds.com/workflow/generate-a-personal-newsfeed-with-bright-data-and-openai)
- [**Human in the loop email response system with IMAP** 10 steps · calls a model · Email](https://millionrounds.com/workflow/human-in-the-loop-email-response-system-with-imap)
- [**Learn anything from HN - get top resource recommendations** 10 steps · calls a model · Email](https://millionrounds.com/workflow/learn-anything-from-hn-get-top-resource-recommendations)
- [**AI-powered LinkedIn connection recommender with a local model** 9 steps · calls a model · Email](https://millionrounds.com/workflow/ai-powered-linkedin-connection-recommender-with-a-local-mode)
- [**Create e-mail responses with Fastmail and OpenAI** 9 steps · calls a model · Email](https://millionrounds.com/workflow/create-e-mail-responses-with-fastmail-and-openai)