What is the User ID or “user name” of my email account?

The “user ID” or “username” of your email account is the the entire email address in this format: user@yourdomain.com. For example, if the email address you are setting up is john@yourdomain.com, the username must be john@yourdomain.com.

For most email programs, you will only enter in this beginning portion of the address anywhere that it asks for “email user ID” or “email username”.