Enter your Default Domain name here. This is the default domain name used when creating new accounts. It is also used in the WorldClient accounts that are created automatically when you are utilizing the MDaemon/WorldClient Integration features. Typically, the value entered here will be the registered Internet domain name that a DNS server resolves to the IP address of the local machine running the server, or a qualified alias of that name.
Alternatively, you may choose to use an internal-only or otherwise non-valid, non-public domain name (such as "company.mail") for your Default Domain Name. When configuring your server in this way it may be necessary to use the Header Translation feature, and/or the Domain Name Replacement Engine, to enable proper mail distribution.
FQDN for this host
This value is the Fully Qualified Domain Name (FQDN) that will be used in the SMTP HELO/EHLO instruction when sending mail. In most cases, this will be your Default Domain name. An IP literal syntax is allowed in this option (for example, "[126.96.36.199]").
This is the Default Domain's IP address.
Restrict connections to this IP
Enabling this option causes MDaemon to restrict the Default Domains connections to the specific IP address found in the Default Domain IP text box. Ordinarily, this control will only need to be used in certain circumstances when hosting multiple domains.
For more information on this type of configuration, see: Hosting Multiple Domains