Any email address used for sending e-mail consists of two main parts. They, in turn, separated by a special service badge, which is popularly often called "the dog."


Part of the email address to the left of the service icon that represents the name of the user who is the owner of the address. Typically, it is chosen by the user in the moment when starts a new email address. So in fact, this part of the address can be almost any: for example, this could be the name of your favorite character from the book, the name of the area where the user would like to visit, or any other concept. However, for reasons of business ethics and the possibility of identification of the owner ' people often choose names that somehow reflect their real names or surnames. Some mail systems can set simple constraints on the choice of the name: for example, the name should not be shorter than three symbols. Furthermore, if your chosen username is already taken, the system will recommend you to choose another option.

Domain name

The right part of the email address, separated from the name of the user to the service icon is the name of the domain on which the person has registered his email. This part of the address actually represents information about where he is. The fact that the partition of a domain name placed after the last dot, is the code of the country in which the registered email address. To date, most countries in the world on the Internet has a code that is also called the top level domain. Thus, the code of Russia is the letter designation .ru, familiar to everyone Internet users in our country. The set of letters to the right of the last dot in the email address can also be used to identify the location of your interlocutor. Part of the domain name, which is between "dog" and the last point is an additional identifier which may reflect the company where you work, city or popular email service. This email address is called domain of the second level. In addition, you can also see that in the e-mail address to the right of the "dogs" there are several parts, separated by dots. This means that the address is a so-called third level domain created by the organization that owns the second level domain to distinguish your own units.