This article shares general information about the use of domains, the primary domain, and internet hostnames in Kerio Connect.
An email domain is a unique identifier that is used to recognize the server for delivering email messages. In an email address, the domain identifier follows the @ symbol. It is important to note that the email domain can differ from the name of the server where Kerio Connect is installed. For example:
- Domain name:
- Email domain name:
- User email address:
Domains are managed in the section Configuration > Domain of the Kerio Connect admin interface. To display information in different columns, right-click any column name and select the items you want to display in the interface.
One domain in Kerio Connect must be set as primary. Users defined in the primary domain only use their username for authentication, not the full email address.
To make messages deliverable, you must specify the DNS name of the server with Kerio Connect installed. This serves as the Internet hostname for Kerio Connect.
Kerio Connect uses this Internet hostname when establishing SMTP (Simple Mail Transfer Protocol) traffic. When the SMTP connection is established, the EHLO (Extended HELO) command is used for retrieving the reverse DNS record. The server that communicates with Kerio Connect can perform checks of the reverse DNS record.
Note: If Kerio Connect is running behind NAT (Network Address Translation), use the Internet hostname of the firewall. To change the Internet hostname, refer to the process for changing Internet Hostnames.