With the help of a distribution list, you can send E-mail to several people at once. Addressing Electronic Mail E-mail addresses are very specific so that each piece of mail can be delivered to the correct person. These addresses are very similar to postal mail addresses in form and function. In order to send mail from Seattle to someone in England, you wouldn't just put their name on the mail. You have to give the specific details of where that person is located so the postmaster can find them.
Postal addresses use a hierarchical addressing system.
The information is arranged from the very specific to the general. E-mail also uses this sort of system, formatting addresses in a way that all computers on the Internet can understand. It shows the account ID of the person to whom you are sending mail. The rest of the information tells the Internet specifically where this account is located. All parts of the address are equally important.