[X4U] Mail Service on XServe

[Johns Maillist]

Instead of trying to get the client to se Entourage or buy Outlook  
client for Mac, I convinced him to stay with the Mac side of his  
network system.
He has a Windows server for .......Well, I am not sure what for  
anymore ;-) It was the mail server, but not anymore.
He has a Max Xserve box, and all seems to be well with that.
I have started the mail service (He is also going to run FTP, but  
that will be later), enabled, POP and IMAP services.
To make sure I have this right, I wanted to ask the advanced folks to  
be sure:
I am going to relocate the IP address (in the NAT side of the Linksys  
router to the Mac, from the PC.
As it is now, the ISP provides the IP to the router, and the router  
NAT moves it to the mail port.
Will I be doing the same on the Xserve Mail server side?
Thanks,
John