example domain usage

https://ace-wiki.win/index.php/Why_Example_Domain_Usage_Matters_for_Documentation_and_Testing

When you set up your email, the domain part after the @ symbol like gmail.com or your own custom one is what we call the domain usage. It's the specific portion that identifies the mail server handling your messages, making sure your emails actually reach the right inbox instead of bouncing back as undeliverable.