E-mail format: login name @ host name. Domain name (e-mail example :888888@qq.com).

The format of an e-mail address consists of three parts:

The first part "login name" represents the account number of the user's mailbox, and supports the combination of letters, numbers and underscores. For the same mail receiving server, the account number must be unique;

The second part "@" is a separator;

The third part is the domain name of the mail receiving server of the user's mailbox, which is used to mark its location.

Commonly used mailboxes include QQ mailbox, Yahoo mailbox, Netease 163 mailbox, MSN mailbox, etc.

Extended data:

note:

1. If the email fails to be sent, please check whether the recipient's network and email address are correct;

2. In China, e-mails between different e-mail providers can be exchanged. For example, you can use QQ email to write letters to friends who use QQ email, or you can use QQ email to write letters to people who use 163 email.

For foreign countries, you may not be able to write letters to some foreign friends with QQ mailbox, because many foreign mailboxes cannot communicate with domestic ones. Although the delivery is successful, it may not be accepted by the other party. At present, those who can send letters abroad can use Google Gmail.