ANSWER I: The e-mail address generally has two parts, user
id and the domain name. The @ (at) symbol is used to separate the user id from
the domain name in the e-mail address. The e-mail address is in the form,
userid@domainname.com (example : rajiv@hotmail.com).
The domain name is usually the name of the service provider
and it cannot be changed. The user name can be changed by creating a new e-mail
address. Some websites like www.myownemail.com allow the users to have a domain
name of their choice like rajiv@rajiv.com or rajiv@britneyspears.com or
rajiv@quackquack.com or any other name on earth. The significance of the @
symbol is that it separates the user id from the domain name.
ANSWER II: Email addresses are basically identifiers of users
and are unique. They are usually composed of the following parts, namely:
username@subdomain.domain. Example: rajesh_27@yahoo.com. These addresses can be
compared to the addresses of the houses in a huge colony. Examples are Hotmail,
Yahoo, Sify and AOL.The domains are in turn classified as sub-domains for the
sake of clarity in large organisations. Some of the top-level domains (TLD's)
are com, .edu, .net,.gov. The `@' symbol indicates that the user can be reached
on the Internet by giving the email address(also called the User's Uniform
Resource Locator (URL)). Courtesy : The Hindu
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