In the console tree of ISA Server Management, click
Firewall Policy.
On the Tasks tab, click Publish Mail
Servers.
In the New Mail Server Publishing Rule Wizard, follow the
on-screen instructions.
Notes
To open ISA Server Management, click Start, point to
All Programs, point to Microsoft ISA Server, and then
click ISA Server Management.
For ISA Server 2006 Enterprise Edition, expand
Microsoft Internet Security and Acceleration
Server 2006, expand Arrays, expand
Array_Name, and then click Firewall
Policy.
For ISA Server 2006 Standard Edition, expand Microsoft
Internet Security and Acceleration Server 2006, expand
Server_Name, and then click Firewall
Policy.
Important
To publish client access to mail servers over RPC, IMAP, POP3,
and SMTP, create a mail server publishing rule. For Web-based
client access such as Outlook Web Access, Outlook RPC/HTTP(S),
Outlook Mobile Access, and Exchange ActiveSync, create an Exchange
publishing rule.
A server publishing rule will be created for each protocol that
you specify on the Select Services page.
After you click Apply in the details pane, the policy is
updated. The new policy applies only to new connections.