Personal e-mail address filling method: user name+@+domain name, @ is preceded by user name, @ is separator, and @ is followed by domain name.

1. email name: usually your user name, which can contain letters, numbers and special characters, such as John Smith, j.smith, johnsmith 123, etc.

2.@ symbol: Fill in the @ symbol to indicate the email service provider you use.

3. Email service provider: fill in the name of the email service provider you use, such as Gmail, Outlook, Yahoo, etc.

4. Suffix: Fill in your email suffix, such as. com，。 cn，。 Net, etc. For example, if your user name is j.smith and you use Gmail email service, your email address is. Your e-mail address is j.smith@gmail.com.

The purpose of e-mail box

1. Personal communication: E-mail is a fast and convenient form of personal communication, and users can send and receive e-mail at any time, no matter where they are.

2. Business communication: E-mail has become the main form of business communication. Users can use e-mail for business cooperation, customer tracking, appointment and notification.

3. Social media: Many social media platforms require users to provide email addresses to register their accounts, and verify and notify them by email.

4. File sharing: Users can send and receive files by email, and share, edit or archive them.