You should read this chapter only if you plan to support multihoming, if your system is behind a firewall, or if you have a non-standard Domain Name System setup.
When the Server starts, it detects its own network address(es). Your Server system is "multihomed" if it has more than one network (IP) address.
If the Server system has several IP addresses, some of them can be assigned (dedicated) to secondary Domains. Accounts in such Domains can be accessed using any POP, IMAP, or other client application without explicitly specifying the full Account name.
The Assigned IP Addresses option allows you to assign network addresses to the main and secondary Domains.
All Available: This option can be selected for one Domain only, and it is the default setting for the Main Domain. All Server's network addresses not assigned to other Domains are assigned to this Domain.
Manually Defined: This option is selected by default for all secondary Domains. If you want to assign (dedicate) an IP address to this Domain, type the address into the text field on the right of the pop-up menu. You can specify several IP addresses, separating them with the comma (,) symbol. Only the Server computer's own addresses are accepted, and all specified addresses should not be already assigned to any other CommuniGate Pro Domain. If you select this option and leave the text field blank, the Domain will not have any IP addressed assigned to it. In this case, to access the Domain Accounts, users should specify the full Account name (account@domain) in their client application settings. See the Access section for the details.
By DNS A-record: When this option is selected, the Server sends a request to the Domain Name System and tries to resolve the Domain name. If an A-Record for this CommuniGate Pro Domain is found in the Domain Name System, the addresses from that record are assigned to the Domain. The system checks that all addresses retrieved from the A-record belong to the Server computer and that these addresses have not been already assigned to any other Domain. This setting is useful if you have several secondary Domains with dedicated IP addresses and you want to redistribute the Server addresses from time to time. Instead of reconfiguring both DNS and Server settings, you may reconfigure the DNS records only, and the Server will take the updated data from the DNS.
By DNS MX-record: When this option is selected, the Server retrieves the highest-priority MX record (relay name) for this CommuniGate Pro Domain, and then processes addresses in the A-record for that relay name.
Use for Outgoing Connections: If this option is enabled, then the non-LAN IP addresses assigned to this Domain (if any) can be used as source network address when establishing outgoing connections (such as SMTP, RPOP, XMPP, etc.)
For each Domain in the Domain List, the assigned network (IP) addresses are displayed. This can be used to check th