20 GroupWise 7 Multi-System Administration Guidecorp.serv.novl host would be contacted first, and 2 out of 3 times, the gwdev.serv.novlhost would be contacted first.Port (column 7): The port number specifies the TCP port on which the MTA listens for incomingmessages. The default port number for the MTA is 7100.Host (column 8): The host specifies the fully-qualified host name or IP address of the MTA’sserver. For a service record, you must specify the host name. For a text record, you can specifyeither the server’s host name or IP address. If you use a host name, it must be mapped to an IPaddress through an DNS "A" record. In the above example, corp.serv.novl,gwdev.serv.novl, and gwsup.serv.novl are all host names that are mapped to IPaddresses through "A" records in DNS.2.5 Configuring the MTA’s Server for DNSLookupsIn order for an MTA in your GroupWise system to use dynamic Internet links to send messages, youmust make sure the MTA’s server is properly configured for DNS lookups. Basic configurationinformation is provided below. Consult your DNS documentation for more detailed informationabout configuring a server for DNS lookups. Section 2.5.1, “Configuring a NetWare 6.x or 5.1 Server for DNS Lookups,” on page 20 Section 2.5.2, “Configuring a Windows 2000 Server for DNS Lookups,” on page 202.5.1 Configuring a NetWare 6.x or 5.1 Server for DNS LookupsOn a NetWare® server, you need to have a resolv.cfg file in the sys:\etc directory thatdefines the DNS name server for that NetWare server. The resolv.cfg file would look similar tothe following, based on a novell.com domain:domain novell.comnameserver 172.16.5.18Consult your NetWare documentation for more detailed information about configuring a NetWareserver for DNS lookups.2.5.2 Configuring a Windows 2000 Server for DNS LookupsOn the Windows* 2000 server:1 Click the Start menu > Settings > Control Panel.2 Double-click Network and Dial-Up Connections, double-click Local Area Connection, thenclick Properties to display the Local Area Connection Properties dialog box.3 In the list of protocols, select Internet Protocol (TCP/IP), then click Properties to display theInternet Protocol (TCP/IP) Properties dialog box.4 Click Advanced to display the Advanced TCP/IP Settings dialog box.5 Click the DNS tab, then make sure the IP address of at least one DNS name server is listed inthe DNS Server Addresses list.Consult your DNS documentation for more detailed information about configuring a Windowsworkstation or server for DNS lookups.