Enable Message Filtering on a Virtual Server

When you enable message filtering on an SMTP virtual server, e-mail received from anyone on the message filtering list will not be accepted. If you have an SMTP virtual server connected to the Internet, for example, you can filter e-mail from one or more outside users who are trying to send e-mail to your organization through a particular IP address. However, on the same virtual server you might want to configure a different IP address (such as for internal users connecting to the Internet). For those internal users, you wouldn't want to enable filtering.

Message filtering is defined globally, but enabled at the SMTP virtual server on a per-IP address basis. Different groups of users can log on with any number of IP address/TCP port combinations. You can decide which combinations, and thus which users or groups, will have their messages filtered.

Note   Before you can enable message filtering on a virtual server, you must create a message filter list.

To enable message filtering on a virtual server:

1. Start System Manager
   On the Start menu, point to Programs, point to Microsoft Exchange, and then click System Manager.
2. Navigate to the SMTP virtual server.
   1. Servers
   2. Server
   3. Protocols
   4. SMTP
   5. SMTP virtual servers
   6. SMTP virtual server
3. Right-click the SMTP virtual server, and then click Properties.
4. On the General tab, click Advanced.
5. In Advanced, select the IP address to which you want to apply the message filter, and then click Edit.
6. Select the Apply Filter check box, and then click OK. Under Filter Enabled, Yes appears.
7. To disable filtering, clear the Apply Filter check box.