Domains are defined in the Configuration → Domains section.
In the Internet hostname field, enter the Internet (DNS) name of the computer where Kerio MailServer is installed (typically, this would be the name of the computer with the appended primary domain name — this way the server name is automatically generated by the configuration wizard). Server names are used for server identification while establishing SMTP traffic.
Upon initializing SMTP communication, the EHLO command is used for retrieving reverse DNS record. The server that communicates with Kerio MailServer can perform checks of the reverse DNS record.
Note: If Kerio MailServer is running behind NAT, enter the Internet hostname that can be converted to the IP address of the sending server, i.e. the internet hostname of the firewall.
Click to set location of public folders:
Unique for each domain — each domain contains its own public folders. This configuration does not allow any user for accessing a folder of another domain.
If there are more domains with user mailboxes created in Kerio MailServer, each of these domains must have at least one public folder administrator specified in the User accounts section (see chapter 13 User accounts).
Global for all domains — users of all domains share the same public folders.
Use the button to change domain type (the same may be performed using the context menu). Any domain ordered as the first one is always primary [Local (primary)]. Other domains can be set either as Local (primary) or as Local.
Note: Any new domain you add can be set as Local (primary), even when another domain already has this status. By taking this step, however, the new domain becomes primary and the former primary domain becomes local only.
Create a new domain by clicking on the button.
You can delete the domain using the button. A domain cannot be deleted if:
user accounts or groups have been already defined within the domain. All accounts must be deleted first (for details, see chapter 13.5 Removing user accounts).
the aliases are defined in it. First, delete all the aliases (for details, see chapter 15.3 Aliases).
it is the primary domain. However, you can create another domain and define it as primary. Then, the former domain can be deleted.