Article ID: 922217 - View products that this article applies to.
When you run one of the following products, you may notice that an unexpectedly low number of unsolicited commercial e-mail (UCE) messages are detected.
Note UCE is also known as spam.
You experience this problem if you use one of the following products to publish your e-mail server:
This problem occurs if the following option is set for the mail server publishing rule in ISA Server:
Requests appear to come from the ISA Server ComputerIf this option is selected for the rule, all traffic seems to have originated from a trusted IP address when the Simple Mail Transfer Protocol (SMTP) server that has Antigen installed receives traffic. This trusted IP address is the ISA Server. Therefore, the SMTP server cannot differentiate between an internal and external source of traffic.
The Microsoft products that are mentioned in the "Symptoms" section use header information to help detect spam. Therefore, these products may miss some spam messages if the messages appear to come from the computer that is running ISA Server.
To resolve this problem, configure the mail publishing rule so that e-mail messages appear to come from the original client. To do this, follow these steps:
For more information about how to configure Microsoft Antigen 9.0 for Exchange, see the Microsoft Antigen for Exchange User Guide. To do this, visit the following Microsoft Web site:
http://technet.microsoft.com/en-us/library/bb914083.aspxFor more information about how to configure Microsoft Antigen 9.0 for SMTP Gateways, see the Microsoft Antigen For SMTP Users Guide. To do this, visit the following Microsoft Web site:
http://technet.microsoft.com/en-us/library/bb914044.aspxFor more information about how to configure ISA Server 2004 to publish a mail server, visit the following Microsoft Web site:
Article ID: 922217 - Last Review: April 1, 2010 - Revision: 2.0