How to get ChatGPT to write emails that sound like you

Steps

1. 1

   Pull 3 to 5 real emails you wrote.

   Pick ones that got a good reply. Mix it up: a follow up, a quote, a quick yes. Remove private info like phone numbers or prices you don't want shared.

2. 2

   Ask ChatGPT to describe your style.

   Paste them in with the style prompt below. It will give you a short list, like "short sentences, starts with the person's name, no sign off line, asks one question at the end".

3. 3

   Fix the description.

   Read it. Cross out anything wrong. Add things you know about yourself, like "never says 'I hope this finds you well'".

4. 4

   Save it.

   Paste the final style into your custom instructions in ChatGPT settings, or into a Project you use for email. Now every new chat starts with your style.

5. 5

   Ask for emails with facts and limits.

   Tell it who the email is to, what happened, what you want and the word limit.

6. 6

   Edit like it is your name on it.

   Because it is. Change any word you would never say.

7. 7

   Feed it corrections.

   When you fix a draft, tell ChatGPT what you changed and why. "I never say 'touch base'." Add the good rules to your saved style.

Prompts you can copy

Learn my style

Here are [number] emails I wrote myself. Read them and describe my writing style in 8 bullet points or fewer: sentence length, how I open, how I close, words I use often, words I never use, tone, and how I ask for things.
Write it as rules another writer could follow.
[paste email 1]
[paste email 2]
[paste email 3]

Write an email in my style

Using my writing style rules, write an email to [name], [job title] at [company].
What happened: [the facts].
What I want: [one ask, like a call Thursday or a signed quote].
Under [number] words. One question at the end. No words I would never use. Sign it [first name].

Make this sound more like me

Here is a draft email. Rewrite it so it sounds like my style rules. Cut anything that sounds like a brochure. Keep every fact, name and number the same. Make it shorter if you can.
[paste draft]

Reply to a tricky email

Here is an email from a customer: [paste email].
Here is what I want to say in plain words: [your rough thoughts].
Write my reply in my style. Calm, direct, under 100 words, no excuses. End with a clear next step.

Example

This is a made-up example. A rep's real emails all look like this: "Hey Jim, quote's attached. Same pricing as last order. Want me to lock it in for Friday delivery? Steve." ChatGPT describes the style as "first name greeting, very short sentences, contractions, no pleasantries, ends with a yes or no question, signs first name only."

The rep asks for a follow up about a late payment. A good draft in that style: "Hey Jim, invoice 4471 from September is still open. Can you check if it's stuck somewhere on your end? Happy to resend it. Steve." A bad draft starts with "I hope this email finds you well" and runs three paragraphs. If you get the bad one, your saved style is not being used. Check that it's in your instructions or Project.

Tips

• Short emails sound more human. Give a word limit every time.
• Your real past emails are better teachers than any list of adjectives like "friendly but professional".
• Keep a "words I never use" list and add to it whenever ChatGPT sneaks one in.
• More email help: email prompts, cold email prompts and follow up guide.

What not to do

• Don't paste emails with customer secrets or pricing your company would not want shared. Clean them up first.
• Don't send the first draft without reading it.
• Don't let it add fake details, like "as we discussed" when you didn't discuss it. Cut those every time.

FAQ

Where do I save my style in ChatGPT?

In the settings there is a personalization area with custom instructions on most plans. You can also make a Project and put your style in its instructions. Either way, it gets used in new chats.

How many emails do I need to give it?

Three to five is a good start. More helps if your emails vary a lot, like short replies and longer proposals.

Does this work in Claude or Gemini too?

Yes. The same prompts work in Claude, Gemini and Copilot. Claude Projects and Gemini both let you save instructions in some form, depending on your plan.

Why does it still sound stiff sometimes?

Usually the prompt didn't include a word limit or the facts were thin, so it filled space. Add a word limit, give real details and tell it "write like you're texting a customer you know".

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First posted October 28, 2026. Last updated October 28, 2026. Free to copy and use, CC BY 4.0.