2. E-mail is a network communication electronic information space provided for network users through the network electronic post office. E-mail has the function of storing and sending and receiving electronic information, and is the most important information exchange tool on the Internet. E-mail is an electronic information space for network users to communicate through the network e-post office. Email has the function of gmail to store and send and receive electronic information, and it is the most important information exchange tool in the Internet. In the network, the e-mail box can automatically receive the e-mail sent by any e-mail box on the network, and can store electronic files with specified size and other formats. E-mail has a separate network domain name, and its e-mail address is marked after @.