Chapter 7 Domain and its settings
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## Chapter 7 Domain and its settings

A domain is a unique identificator for a host or a computer network. Email domain is a unique domain identificator which is used to recognize to which server mail should be delivered. In email addresses, the domain identificator follows the "at" symbol (`@`).

Email domain might be (and often is) different from the name of the server where Kerio MailServer is installed and running. The server name can be for example `mail.company.com` where the email domain name is `company.com`. Users in this domain will use email addresses following the pattern `user@company.com`.

Figure 7.1. Domains

Kerio MailServer can include any number of email domains (see figure 7.1 Domains). Various parameters can be defined for each domain and its users. The only condition is that one of the domains must be set as primary. For details on setting of primary domain and its use, refer to section 7.2.1 Primary Domain

### Warning

User accounts are defines separately in each domain. Therefore, domains must be have been defined before accounts are created.

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6.3 Troubleshooting | Contents | 7.1 Initial settings