How to find an email address by first and last name
1. Open this Google Sheets
2. Choose File > Copy
3. In the field for entering first and last name, enter what you know.
4. Enter a popular email service in the domain field, for example: gmail.com, yahoo.com, protonmail.com, aol.com, and icloud.com
5. Hover over the addresses and look at the profile pictures.
The address does NOT exist if the profile picture has a light blue background.
If you don't see the profile picture, refresh the page