Junk E-Mail

Junk e-mail is a huge issue. One client with whom this author recently worked installed its first e-mail filtering software and found that it had 46 percent fewer inbound e-mails.

Exchange 2003 has new capabilities to work with Black Listing companies to delete e-mail that is coming from hosts that are known or suspected of being junk e-mail senders. This area of discussion is called recipient and sender filtering. In Exchange 2003, you can block unwanted e-mail based on IP addresses, sender and recipient e-mail addresses, or e-mail domains. You can also filter e-mail that is sent to users who are not in Active Directory or that the sender does not have permissions to send e-mail to. Filtering is discussed at length in Chapter 20, “Supporting Internet Protocols and SMTP.”