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SMTP only from a specific address? - 15.Feb.2008 10:36:01 AM

charlieit

Posts: 83
Joined: 19.Aug.2004
From: US
Status: offline

I have published an exchange 2003 server in ISA and everything is working fine. My company uses Postini to filter spam and viruses and such. I want to specify that I ONLY want to accept incoming SMTP connections from a specific external address:

64.18.0.0
255.255.240.0

For instance: On a Sonicwall Firewall, I would simply create a "network object" and then create an access rule which says to only allow inbound SMTP from that address.

What would I do in ISA? Do I create an access rule? Would that work hand-in-hand with my Published Exchange Server? Or do I simply go into my published exchange server properties and go to the "from" field and add a new "network", "computer", or "address range"?

Please help!

Thank you,

Charlie