Create the SMTP Server Publishing Rule
You can create an SMTP Server Publishing Rule to provide external users and servers
access to the Microsoft Exchange SMTP service. In general, you will prefer to use the ISA
Server 2004 firewall as a secure SMTP filtering relay to prevent external users and servers
from directly connecting to the Exchange Server. The Server Publishing Rule discussed in the
following walkthrough is best used to provide external SMTP servers access to the Exchange
Server so they can send mail to e-mail under your administrative control.
Perform the following steps to create the SMTP Server Publishing Rule:
10. Open the Microsoft Internet Security and Acceleration Server 2004 management
console, and expand the server name in the left pane of the console. Click on the
Firewall Policy node.
11. Right click the Firewall Policy node and point to New. Click Server Publishing Rule.
12. On the Welcome to the New Server Publishing Rule Wizard page, enter the name for
the rule in the Server publishing rule name text box. In this example, we will name the
rule SMTP Server. Click Next.
13. On the Select Server page, enter the IP address of the Exchange Server on the Internal
network. In our current example, the IP address is 10.0.0.2. Enter 10.0.0.2 into the text
box. Click Next.
14. On the Select Protocol page, select the SMTP Server protocol from the Selected
protocol list. Click Next.
15. On the IP Addresses page, put a checkmark in the External check box and click the
Address button.
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