Once the in-bound mail routing issues described in section 5.3.2 Configuring the External Site to Send Waiting Mail have been resolved, then any mail for users at your domain will be sent to the hosts listed in those MX records. However, Unoverica Message Transport will not attempt to deliver these messages to local users until you have instructed it to do so.
By default, Unoverica Message Transport will only deliver mail to local users when the destination system portion of the address matches the TCP/IP hostname of the local mail server. If the destination system portion of an incoming mail message does not match the local hostname, then the system will attempt to deliver the message using one of several methods. It will attempt to locate a host in the SYS:/ETC/HOSTS database, as well as conduct DNS lookups, and will also use an explicit IP address if that has been provided. If none of these methods work, then the mail is returned to the sender as undeliverable.
Unoverica Message Transport keeps a list in memory of the hostnames that it will accept mail for. In order to allow Unoverica Message Transport to deliver mail addressed to a domain to local users, you must add the domain name to that list.
This is achieved through the use of Unoverica Message Transport’s UCMCON.NLM management tool. UCMCON.NLM is a NetWare Loadable Module that runs on the NetWare server. To load UCMCON, type the following command at the NetWare console prompt:
:LOAD UCMCON <Enter>
You will be presented with a screen similar to the following:
Figure 5.22: UCMCON's main menu
Select the "Configuration" menu item and press <Enter>. You will then be presented with a set of configuration menu choices similar to the following:
Figure 5.23: UCMCON's Configuration menu.
Select the "Classes" menu option and press <Enter>. You will then be presented with a list of the currently defined "Class" options, similar to the following:
Figure 5.24: UCMCON's currently-defined classes.
"Classes" are used by SENDMAIL (and derivatives of SENDMAIL such as Unoverica Message Transport) to define variables that can be used throughout the system configuration. For more information on SENDMAIL classes, refer to section F.4 Defining Macro Classes.
The "User-defined class $w (Cw)" class defines a variable that identifies the hostname of the local system. This hostname can be an IP address, the hostname associated with an IP address, or a domain name. When Unoverica Message Transport first loads, it automatically determines the values for the $w class based on data in the SYS:/ETC/HOSTS file and the DNS data for the current domain. However, these defaults only refer to the hostname for the local system’s IP address, and does not refer to the name of the current domain.
In order to add the domain name to the list of systems that the server will deliver mail for, you must add it to the $w class. This is achieved through the use of the "$m" variable, which defines the domain name in use on this system. The "$m" variable is automatically built when Unoverica Message Transport loads, although it is not automatically associated with the $w class. You must manually add this entry.
To do this, select the "User-defined class $w (Cw)" entry, and press <Ins>. You will be presented with a menu similar to the following:
Figure 5.25: UCMCON's Class menu.
Select the "Add to Current Class" menu option and press <Enter>. You will be presented with an edit box for adding a new entry to the current $w class, similar to the following:
Figure 5.26: UCMCON's Add-to-Current-Class edit box.
Type the name of your domain and press <Enter>, and then press <Esc> to close the edit box. The $w class should now contain an entry of "localhost" and whatever domain name you entered into the edit box. Continue pressing <Esc> until you are returned to the NetWare console prompt. Your system will now process local mail received for your domain name.
For more information about the $w class, refer to section F.4.5 User-defined class $w (Cw). For more information about the $m macro, refer to section F.3.5 Domain part of hostname $m (Dm).
STEP: To continue to the next step in the configuration process, go to section 5.3.4 Changing the From: Headers.
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