>1. Setup an MX record with a lower priority pointing to our Imail server.

yep

>2. Add their Domain info in the NT host file.

yep

>3. Add their IP address to allow mail relay.

yep

they must have a fixed ip on their exchange box

>But what I don't know, is if I need to add a virtual domain for them

that�s not in the RTFM, so don�t do it.

>or how I would set it up.  Does Imail automatically know to hold the mail?

yes, it decides by looking at hosts file.

>It can't be that easy.

it is.

>Has anyone done this?

there are 1000�s of us

Len


http://MenAndMice.com/DNS-training
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http://IMGate.MEIway.com  : Build free, hi-perf, anti-abuse mail gateways


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