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How to configure
ISA
Server for Inbound Mail
You must configure ISA Server to allow inbound Internet
mail for Exchange. To do that, you create a Mail Server Publishing Rule for
Inbound SMTP Traffic. Please follow these steps:
1. Expand Microsoft ISA Server Management and click Firewall Policy.
2. On the Firewall Policy task pane on the Tasks tab, click Publish a Mail
Server to start the New Mail Server Publishing Rule Wizard.
3. On the Welcome page of the wizard, provide a name for the rule, such as
Inbound SMTP, and then click Next.
4. On the Select Access Type page, select Server-to-server communication:
SMTP, NNTP and then click Next.
5. On the Select Services page, select SMTP. You may also select Secure SMTP
if you want to publish your Exchange server to receive secure SMTP
communication. Newgroups NNTP is for the publishing of a news server, to
receive e-mail messages from newsgroups.
6. On the Select Server page, provide the IP address of the Exchange server,
and then click Next.
7. On the IP Addresses page, select the network on which ISA Server will
listen for requests. Because you want to receive communication from the
External network, select External, and then click Next
8. On the Completing the New Mail Server Publishing Rule Wizard page, scroll
through the rule configuration to verify that you have configured the rule
correctly, and then click Finish.
9. In the ISA Server details pane, click Apply to apply the changes you have
made. It will take a few moments for the changes to be applied.
To test Inbound SMTP Traffic Using Telnet
Mail servers on the Internet should now be able to connect on port 25 to
your inbound SMTP server to send mail to your organization. You should test
that this connectivity is working.
From a computer connected to the Internet, use Telnet to
access your external MX record host on port 25.
For example, if an MX record in corporate DNS lists mail.chicagotech.net as
the host, you would type the following at a command prompt:
telnet mail.chicagotech.net 25
In this example, you would see a response similar to the
following:
220 mail.chicagotech.net Microsoft ESMTP MAIL Service, Version: 6.0.3790.0
ready at Wed, 25 Jun 2003 09:08:58 -0700
If you do not see a response from your SMTP server, try
connecting to the ISA Server computer's IP address directly. If that works,
it is possible that you have a DNS configuration problem.
After you confirm that you can use Telnet to access the SMTP server through
ISA Server, you should be ready to receive inbound SMTP mail from the
Internet. Send a test message from the Internet to someone in your
organization, and verify that it arrives.
Post your questions, comments, feedbacks and suggestions
Contact a consultant
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