When you exit Pine, you can change your mind if you have deleted any messages and leave your mailbox unchanged if you want. Sending electronic mail is similar to sending letters through the national postal system. Each Internet host computer has a unique domain name associated with it, and each person using that host has a unique name. The mail name is usually, but not always, the recipient's login name. The destination computer is specified as a string of names which are separated from each other by periods.
Domain names can have any number of levels.
In the United States, com, mil, edu, and gov are fairly standard. Sometimes the best way to get someone's e-mail address is to phone them and ask for it. If the person is on campus, you can look in the University telephone directory. Many faculty, staff, and students list their e-mail addresses there. You can also access the University phone book on-line through the World Wide Web.