E-mail E-mail is an important information service mode on the Internet, which provides an extremely fast, simple and economical way for Internet users all over the world to communicate and exchange information. Compared with ordinary letters, e-mail is very fast, shortening the time of information transmission from a few days to more than ten days to a few minutes. It is very convenient to use e-mail, saving the trouble of putting up stamps and running the post office. Compared with telephone, using email is very economical, and the transmission is almost free. It is precisely because of these advantages that hundreds of millions of Internet users have their own mailboxes, and e-mail has become the most used Internet application.

The email address is based on the domain name, and zuccchen@ema.zju.edu.cn is the email address used by the author in the campus network center of Zhejiang University. Emai 1 address is an address dynamically assigned by the Internet, not an IP address, which is a static fixed address that Internet hosts must have. In addition to providing users with basic e-mail services, you can also use Email to distribute e-mails to each registered member in the mailing list and provide electronic journals. E-mail is delivered through standardized Simple Mail Transfer Protocol (SMTP), which is a part of TCP/IP protocol. It outlines the information format and transmission processing method of e-mail. At present, the most commonly used email sending and receiving tool in Windows operating system environment is the email sending and receiving tool in Netscape Navigator browser. In the "Netscape Navigator Send E-mail" window, the user enters the other party's e-mail address in the "To" column, the sending destination of the e-mail copy in the "Cc" column, the e-mail title in the "Subject" column and the e-mail content in the "Body" column. Of course, you can also use Windows Notepad to edit the email body first, and then use the attachment button to adjust the email. Finally, click the send button with the mouse and the email will be sent out. If the user clicks the Get:mail button in the mail receiving and sending window with the mouse, the latest mail will be displayed, and the user can watch it one by one.