RE: SMTP Gateway on ISA

  • From: "Thomas W Shinder" <tshinder@xxxxxxxxxxx>
  • To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
  • Date: Wed, 27 Oct 2004 08:56:18 -0500

You don't need to make the ISA firewall an authenticating SMTP relay.
Its just one of many options. You can use it for:

* inbound relay
* outbound relay
* inbound and outbound relay
* authenticating inbound relay
* authentiating outbound relay
* authenticating inbound and outbound relay

Depending on your requirements, the ISA firewall may or may not need to
be a member of the domain. If you need to make the ISA firewall a member
of the domain, then make it a member of the domain, and create the
appropriate DMZ for it. If politics prevents you from securing your
organization adequately, then you'll have to make your decisions based
on that.

What are your requirements? Why use the ISA firewall as a relay at all?
Why not use a dedicated SMTP relay? Most secure config is to make the
ISA firewall a member of the domain, put an SMTP relay in an anonymous
access DMZ behind the ISA firewall, and configure the anonymous access
DMZ SMTP relay to forward mail to the Exchange Server, using SSL and
authentication.

HTH,

Tom
www.isaserver.org/shinder
Tom and Deb Shinder's Configuring ISA Server 2004
http://tinyurl.com/3xqb7
MVP -- ISA Firewalls


-----Original Message-----
From: Mustafa Cicek [mailto:mbcicek@xxxxxxxxx] 
Sent: Wednesday, October 27, 2004 9:57 AM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: SMTP Gateway on ISA

http://www.ISAserver.org

Hi Tom!
I want that ISA should be responsible for all outbound and inbound SMTP
traffic. In addition Exchange should send outbound mails to ISA, NOT to
external network.

Must I configure SMTP Virtual Server on Exchange so that it sends all
outbound mails to ISA server (as Smarthost)?

Other configurations on ISA or Exchange necessary?

Best Regards
Mustafa  

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