Hi John,
To be able to use GPT to write email that is in your style, you can try this approach…
1. Find the best prompt
You can use the GPT playground to find the best way of generating emails similar to yours.
In this example, I use a style of George Washington writing to his wife, and ask it to reproduce a similar letter.
2. Automation
Once you get the best results you are looking you can use this google sheet I have in this link to automate this to multiple recipients. See Google Spreadsheet + GPT3 - #10 by nelson
3. Export
After you reviewed all your emails from automation, you can export to third party email provider to send out the emails for you.
I think that’s all you need to do, feel free to try it out, let me know if you run into any roadblocks.
Good Luck.