Next Previous Contents

2. Using names or IP numbers

Mail may come from machines which are identified using their host name or sometimes using their IP number. It is sometimes more practical to classify machines based on their IP number instead of their domain name. In the following section you will see that sometimes you are allowed to enter a name, sometimes an IP number, and sometimes both.

2.1 Specifying a network

You can specify a network number by simply entering the prefix of the IP number for that network. For example, for the class C network, you simply enter 192.168.1. (note the trailing dot).

2.2 Specifying a host or a domain

To specify a host name, you enter the fully qualified name, like To specify a domain, simply enter it. This means that any machine that is part of this domain will be processed in the same way.

Next Previous Contents