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Article ID: 261087 - View products that this article applies to.
This article was previously published under Q261087
This article describes how to enable or disable message filtering on a Simple Mail Transfer Protocol (SMTP) virtual server.
When you enable message filtering on an SMTP virtual server, messages received from people on the message filter list are not accepted. For example, if you have an SMTP virtual server that is connected to the Internet, you can filter messages from Internet users who attempt to send messages to your organization through a particular Internet Protocol (IP) address. However, on the same virtual server, you may want to configure a different IP address for people in your organization to use to connect to the Internet. For those people, you do not want to enable message filtering.
The message filter list is a global setting that is defined for the entire organization, but message filtering is enabled on an SMTP virtual server for a particular IP address. Different groups of people can log on to an Exchange computer with different IP address and Transmission Control Protocol (TCP) port combinations. You can decide what combinations, and therefore what people in your organization, will have their messages filtered.
Note Before you can enable message filtering on an SMTP virtual server, you must create a message filter list. For additional information about how to create a message filter list, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/258696/ )XADM: How to modify global settings in Exchange System Manager
(http://support.microsoft.com/kb/821881/ )How to modify global settings in Exchange System Manager
Enabling or Disabling Message Filtering on an SMTP Virtual ServerTo enable message filtering on an SMTP virtual server: