More server/router questions

[Mike Szumlinski]

Okay, I have my linux machine running Apache as well as being a router 
for my small personal network, so it has a real world IP. I recently got 
myself an old Mac that I want to turn into a mail server for my domain 
for the whole world to see. My question is this: Can I set up the Mac 
with a 192.168.x.x IP behind the router and have the mail server behind 
the router recieve mail to the real world IP and send out mail as well? I 
may be a total idiot, but I could not get qmail or exim to work right for 
me, and I had this Mac sitting around collecting dust. 

-Mike

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|Mike Szumlinski           |
|Michigan State University |
|A26079565                 |
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"The future is no place to place your better days" -DMB