TCP/IP Information
Copyright (C) 1997, 1998 by International Business Machines Corporation

DDNS Server Administrator Help

Mail Exchange Tab

Use the Mail Exchange tab of the Host Notebook to specify one or more mail exchangers for the host, which overrides any mail exchangers defined for the domain. A mail exchanger runs a mail agent that delivers or forwards mail for the host. The data is stored in the mail exchanger (MX) resource record.

The Mail Exchange tab has these fields:

Mail exchange host name
Specifies the complete host name of a mail exchange host to add to the mail exchange host set.

Note:

The preference number must accompany the mail exchange host name. After typing both, click Add.

Preference number
Specifies the preference number for a mail exchanger, which is a number between 0 and 65535, where 0 represents the most preferred mail exchanger. Preference numbers are significant only in relation to preference numbers of other mail exchangers specified. A mail exchanger with a low preference number generally represents the quickest and most efficient mail route. If the mail exchanger with the lowest preference number cannot be contacted, the one with the next lowest number is tried.

The mail exchange host name must accompany the preference number; after typing both, click Add.

List box
Displays the preference numbers and names of the hosts in the mail exchange host set. To remove an entry from the list box, select the entry and click Remove.

These push buttons are available on the Mail Exchange tab:

Add
Puts the specified item into the corresponding list box.
Remove
Deletes the selected item or items from the list box.
OK
Retains the configuration data in this notebook and closes the notebook.
Cancel
Cancels any actions taken in this notebook and closes the notebook.
Help
Displays information about the current notebook page.


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