1. In Exchange System Manager, click the virtual server that you want to configure.
2. On the Action menu, click Properties.
3. Click the Access tab, and then click Relay.
4. In the Relay Restrictions dialog box, either click Only the list below to restrict relaying mail through this virtual server to the listed computers, or click All except the list below to prevent the listed computers from relaying mail through this virtual server.
5. Click Add.
6. In the Computer dialog box, you can specify computers by one of the following criteria:
   • IP Address
   • Range of IP Addresses
   • Domain
7. Click OK to add the restriction and return to the Connection dialog box.
   To add more restrictions, repeat the preceding steps. Click to select the Allow all computers which successfully authenticate to relay check box, regardless of the list that you selected in step 4, to allow all authenticated clients to relay.
8. Click OK, and then click OK.

The information in this article applies to:

• Microsoft Exchange 2000 Server