Why this email prompt structure works
Most weak AI emails come from weak instructions. If you type "write a follow-up email to a client", the model has to guess who the client is, what happened before, and what you want to happen next. It fills those gaps with generic filler: "I hope this email finds you well", vague benefits and three different calls to action.
This builder forces the three things every good email needs: a specific reader (including how well you know them, which changes the register), the facts that must appear, and one desired action. The prompt also tells the model to put the main point in the first two sentences, because many people only read the preview in their inbox. Finally, it forbids invented dates and commitments and asks the model to mark unknowns in [brackets], so you never accidentally send a promise you did not make.
Asking for the assumptions at the end is a small trick that pays off: it shows you exactly where the model guessed, so you can correct those spots before sending.
Worked example
Say you ran a product demo for a dental clinic last week and want to follow up without sounding pushy. These are the inputs:
- Type of email
- follow-up
- Recipient
- Dana, the operations manager at a dental clinic who attended our booking-software demo last week
- Relationship
- we have met once or twice
- Key points
- Thank her for joining the demo; She asked whether we integrate with her existing calendar - we do (Google and Outlook); Offer a 14-day free trial
- What should the reader do?
- Reply to book a 20-minute setup call next week
- Tone
- Friendly and clear
- Length
- Short (80-150 words)
The builder turns these inputs into the following prompt. Load it into the form above with the Demo follow-up example chip and change anything you like.
You are an expert communicator who writes clear, effective emails that get a response.
## Task
Write a follow-up email to Dana, the operations manager at a dental clinic who attended our booking-software demo last week.
Our relationship: we have met once or twice.
## Key points to include
- Thank her for joining the demo
- She asked whether we integrate with her existing calendar - we do (Google and Outlook)
- Offer a 14-day free trial
## What I want the reader to do
Reply to book a 20-minute setup call next week
## Requirements
- Tone: Friendly and clear
- Length: Short (80-150 words)
- Put the main point or request in the first two sentences.
- Use only the facts above. Do not invent dates, numbers or commitments; mark anything I must fill in with [brackets].
- End with one clear, specific next step.
## Output format
1. A subject line under 60 characters.
2. The email body, ready to send.
3. One line listing any assumptions you made.This page shows only the prompt. The answer depends on the AI tool you paste it into, so always review the result before you use it.
Tips to improve your results
- Name the recipient's role and situation, not just their name. "A busy clinic manager who already saw the demo" gives the model far more to work with than "Dana".
- Keep key points to facts. Let the AI handle wording; you handle accuracy.
- Ask for one call to action. If you need two things, consider two emails.
- For sensitive emails (apologies, complaint replies), add what you will and will not offer in the background field.
- After the first draft, reply with a short correction such as "make it 30% shorter and less salesy" instead of starting over.
Frequently asked questions
Does this tool write the email for me?
No. It builds a prompt. You paste the prompt into ChatGPT, Claude, Gemini or any other AI assistant, and that assistant writes the email. Nothing you type here is sent to us or to any AI service.
Which AI model works best for emails?
Any current general-purpose assistant handles emails well. The quality difference usually comes from the prompt, not the model. A specific prompt with real facts beats a vague prompt in a better model.
Can I use it for emails in other languages?
Yes. Fill in the form in English and add "Write the email in German" (or any language) to the background field. The structure of the prompt still applies.
How do I stop AI emails sounding robotic?
Choose a tone such as "Warm and personal", give real details, and ask for a shorter length. Generic input produces generic output. You can also paste one of your own past emails as a style example.
Is my input saved?
Your answers are stored only in your own browser (localStorage) so the form is still filled in when you come back. Use the Clear button to remove them.