This doesn't have to be done on Exchange Server at all.  

If they don't use NAT, then all you need to do is route their MX servers
on your Router/Firewall/VPN end point to route the traffic through the
tunnel.

If they do use NAT, they you probably have to set up host files on your
exchnage server to indicate the appropriate mx server addresses.

Either way, it's probably best to deny the access to those addresses
from your outgoing border routers to ensure that no mail went through
that way.

Andrew
MCSE (w2k/nt4) + CCNA 

-----Original Message-----
From: MSX dude [mailto:[EMAIL PROTECTED] 
Posted At: Monday, June 02, 2003 9:55 AM
Posted To: ExchangeDiscussion
Conversation: routing mail accross vpn link
Subject: routing mail accross vpn link


Instead of doing certificates to secure mail one of our partners would
like to simply route mail accross our shared VPN link.  We run Exchange
5.5 sp3.  Do any of you have any experience with this?  How would I set
up the mail for domain to avoid going out to the internet and route to
the vpn link?

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