Addressing mail to users on a different network

If your network is connected to other networks, you can send mail to users on the other networks.

The address parameters differ depending on how your network and the other networks address each other and how they are connected. Depending on how your network configuration, take one of these actions:

If you are using a central database of names and addresses, use the mail command shown in the following example:
```
mail LoginName@SystemName
```
If the networks use a central database of names, you do not need any additional information to send mail to users on the connected networks. Use the same addressing format as for users on your local network.

This type of addressing works well when the nature of the network allows a central database of names to be maintained.
If your network uses domain name addressing, use the mail command shown in the following example:
```
mail LoginName@SystemName.DomainName
```
For networks that span large, unrelated networks in widespread locations, a central database of names is not possible. The DomainName parameter defines the remote network, relative to your local network, within the defined structure for the larger group of interconnected networks.
For example, if you enter the following command:
```
mail kelly@merlin.odin.valryanl
```
your mail is sent to user kelly on the system merlin, which is on a local network named odin that is connected to a second network whose domain is called valryanl.