Best way to “route around” an SMTP SmartHost?

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Exchange 2003
My single Exch 2003 server currently uses a "smarthost" on the default SMTP virtual server. This is an outsourced virus/spam scanning service that also adds a corporate disclaimer. However, I'd like for some users to be able to bypass that smarthost for listerv messages and the like. I used to be able to designate routing on a per-domain basis in Exch 5.5...is there similar functionality in 2003? If I use another SMTP virtual server for this, how do I ensure that only designated senders use it while everyone else uses the default? Thanks!
ASKED: November 16, 2004  1:12 PM
UPDATED: November 17, 2004  1:49 PM

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Hmmm … the Smarthost is an outsourced virus/spam scanner. I assume that you are wanting to route messages originating from inside to destinations outside your network. The only way that could work is to set up a separate SMTP service that isn’t tied to the domain/Exchange policies and “smarthost.” Of course, this is completely dependent on your network policy relating to unauthorized SMTP services/servers. The purpose of the outsourced scanning system is to prevent the proliferation of infected or spam messages originating from your network/organization. Thus, reducing your organization’s potential liability and reputation. Bypassing that would be dangerous and your network security policy very likely forbids this. My own network security policy requires that all email (incoming and outgoing) goes through the scanner and there are no other authorized SMTP services/servers. No exceptions.

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