Exchange 2003 Filtering

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Exchange 2003 includes a set of features that allow the administrator to create sender, recipient, and connection filtering lists in attempt to block spam at the perimeter of the organization, thereby reducing costs by rejecting messages at the earliest opportunity. Exchanger 2003 supports the following filters:

  • Connection filtering   Filters inbound messages by comparing their IP address against a block list provided by a real-time block list service. You can also enter your own set of accept/restrict IP addresses at a global level.

  • Sender filtering   By default, SMTP connections that are created by senders on this list are dropped.

  • Recipient filtering   Allows you to set global restrictions on mail to specific recipients.

For more information about how filters are applied, see What's New in Exchange Server 2003.