Mark,

In scenario 2 will your SMTP server in the DMZ subnet be part of the Exchange 
organization? If so the whole DMZ thing isn't really going to get you much if 
anything. Personally I think DMZs are outdated and not a good model anymore.

I would go with option 1. 

Thanks,
Brian Desmond
[EMAIL PROTECTED]

c - 312.731.3132


> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:ActiveDir-
> [EMAIL PROTECTED] On Behalf Of Mark Parris
> Sent: Tuesday, December 05, 2006 11:42 AM
> To: ActiveDir.org
> Subject: [ActiveDir] OT: Exchange Design Question
> 
> A friend of mine has asked me to ask the group the following Exchange
> related question.
> 
> An Exchange 2003 environment that has been upgraded from Exchange 2000
> needs to have SMTP reconfigured for outbound mail. There are two
> proposals on the table but they are not sure of the best approach.
> 
> 1 Exchange Frontend/Backend configuration with both servers on the
> internal network and an ISA server in the perimeter network publishing
> internal SMTP to the internet or in this case messagelabs
> 
> or
> 
> 2 Exchange Frontend/Backend configuration with both servers on the
> internal network and an SMTP server in the DMZ relaying to messagelabs
> 
> Messagelabs host the MX records and cleanses most viruses out of the
> emails but may change in the future though there is no current
> managment thinking to do so.
> 
> Given these two scenarios which one would most people choose and if so
> why?
> 
> The environment is approx 2000 users and there are eight sites  and the
> chosen SMTP configuration will be repeated in another site for
> resilience.
> 
> Many thanks as always,
> 
> 
> 
> 
> Regards,
> 
> Mark Parris
> 
> Base IT Ltd
> Active Directory Consultancy
> Tel +44(0)7801 690596
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