1, the input method needs to use half-width English.

2. A complete e-mail address consists of three parts: user ID, @ and e-mail service provider. The @ symbol is marked by CCB itself, so the user ID is filled in the first half and the email service provider is filled in the second half.

Definition of e-mail:

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 domain name, and its e-mail address is marked after @. The general format of e-mail is: user name @ domain name.

E-mail service is an information transmission service based on computer and communication network, which provides users with various types of information such as e-mail, digital fax of documents, images and digital voice by means of electric signal transmission and information storage. E-mail enables people to send and receive letters at any time, which solves the limitation of time and space and greatly improves work efficiency.