What is an email address? How to fill it in?

The email address is a fixed format of email created by Ray Tomlinson: user@mail.server.name, which is similar to the address of the recipient when mailing an ordinary letter. In the format, user is the recipient's user name, and mail.server.name is the recipient's email server name. It can also be a domain name or an IP address represented by a decimal number. Each user's email address on the Internet is unique, which makes sending and receiving emails more convenient and accurate.

The email address is a fixed mailbox format (user@mail.server.name) created by Ray Tomlinson, which is similar to the one received when mailing an ordinary letter. The sender's address. In the format, user is the user name of the recipient, and mail.server.name is the name of the recipient's email server. It can also be a domain name or an IP address represented by a decimal number. Each user's email address on the Internet is unique, which makes sending and receiving emails more convenient and accurate.

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When filling in the email address, you need to fill in the correct email format, including the user name and email server name. In the username part, you need to pay attention to the following points:

1. Usernames generally consist of letters, numbers or underscores. English half-angle brackets and special symbols can also be used.
2. Username length generally does not exceed 32 characters.
3. The username cannot contain illegal characters, such as @, #, $, etc.

In the email server name part, you need to pay attention to the following points:

1. The email server name generally consists of a domain name or an IP address represented by decimal numbers.
2. The email server name cannot contain illegal characters, such as @, #, $, etc.
3. If you use a domain name as the email server name, you need to ensure that the domain name resolution is correct.

When filling in the email address, you need to check it carefully to ensure that the format is correct and to avoid errors or omissions. At the same time, you also need to pay attention to the security of your email account and do not disclose it to others easily.

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