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question on Mail server + ISA server

By Hunterzh ·
I have one mail server with IMAIL installed. Now hope to install ISA server 2000 on the same server.
I cannot install schema into AD, due to an error message: "the format of the specified computer name is invalid"; so it is a stand alone server - using 2 NICs, one for Extranet, the other for Intranet.
After installation of ISA, I create two policies, one for HTTP and another for SMTP & POP3, allowing Intranet clients to visit Internet, and use mail services.
But after then I find the Mail Server itself doesn't work properly, whilst all clients can visit Internet.
The mail server cannot send out or receive mails for the clients.
How can I ensure the SMTP and POP3 service of the mail server work properly after installing ISA server2000?

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by CG IT In reply to question on Mail server + ...

open up your ISA Server management console. In the left pane, expand Access policy, IP packet filters. Make sure you have a SMTP OUT IP packet filter and a SMTP IN IP packet filter for port 25 and that they are enabled. You must have these packet filters for SMTP traffic through port 25.

For POP3 you have to have two filters same as SMTP only for port 110 and that they are enabled.

Make sure you specify the correct NIC IP addresses for the external interface and internal LAN <I recommend using static IP addressing scheme if your running a Stand alone box>.

note: Site & Content Rules apply to users and computers and what they can and can not access on the internet as well as when they can access the internet. Protocol Rules <default install for ISA server is "all protocols"> specifies which protocols ISA server will allow thought. Both these type of rules do not create IP packet filters when you create the rule. You have to create the packet filters to allow traffic through specific ports. note: if those packet filters are not present in the IP packet filters, ISA server wizard might not have recognized your IMAIL server and therefore might not have asked what packet filters to create.

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by Hunterzh In reply to question on Mail server + ...

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