The general mailbox format is: login@hostname. Domain name. Common mailboxes are 163 mailbox, 126 mailbox, QQ mailbox, Google mailbox, icould mailbox.

Electronic mailboxes can automatically receive e-mails sent by network electronic mailboxes, and can store electronic files of various formats. E-Mail has a separate network domain name, separated by a symbol "@" for "at" (at), the left side of the symbol is the other party's login name, and the right side is the complete host name, which consists of the host name and the domain name.

Common mailboxes are:

1, QQ mailbox:

格式为xxx@qq.com

2, NetEase 126 mailbox:

格式为xxx@126.com

3, NetEase 163 mailbox

格式为xxx@163.com

4, Sina Mailbox

格式为xxx@sina.com

5, Ali Mailbox

格式为xxx@aliyun.com