To begin to use e-mail, it is necessary to register on one of the websites providing such service. Having received set of the login and the password, you will be able to get access to the electronic mailbox from any computer or phone connected to the Internet.
Also the normal mailbox is necessary for communication with other natural and legal entities of the organization electronic, and sometimes. The first of them can be got on own or third-party server, and the second - in local post office.