Parts of an email address
There are four parts for an email address which includes the username, an @ symbol, domain name, a dot and the domain.
Username: This part is usually the name of the person to whom the mail is sent.
@ symbol: This separates the username and domain name. The symbol @ was invented by Ray Thomilson in 1971.
Domain name: This refers to the mail server, the place where your email is stored.
Dot(.): This separates part of the address.
The domain: Domain tells what type of web page you are using (.com,.org,.edu etc…). Eg: (firstname.lastname@example.org)