* on the Tue, Feb 20, 2007 at 02:23:53PM +0100, Pickel, Gerd - Betax-Systems 
GmbH (IT) wrote:

> I just installed exim on a server to act as a gateway and it works fine.
> Now here comes the special demand: from inside the network an Exchange
> server sends mails to the gateway where the sender address looks like
> [EMAIL PROTECTED] Exim itself sends these messages back because
> it is configured to relay these message to the Exchange server when
> they were coming from the outside. Now, how can I configure exim to
> check the sender IP/name (Exchange server) and the localpart of an
> email address to relay these messages to a specific mail server
> (IP/name) outside the network?
> I thought about combing sender_address_relay and hostlist relay_hosts
> in a router, but is it the right approach?

You'll find a router for doing the relaying according to mx records
similar to this:
  
dnslookup:
   debug_print              = "R: dnslookup for [EMAIL PROTECTED]"
   driver                   = dnslookup
   domains                  = ! +local_domains
   transport                = remote_smtp
   same_domain_copy_routing = yes
 no_more

You want to stick a smarthost router in front of that which delivers to
a specific host on certain conditions. The one below would route all
mail for [EMAIL PROTECTED] that originated from 123.123.123.123 to the mx
server "the.mx.server" directly:

smarthost:
   debug_print = "R: smarhost for [EMAIL PROTECTED]"
   driver      = manualroute
   condition   = ${if and{\
                    {eq{$sender_host_address}{123.123.123.123}}\
                    {eq{$local_part}{foo}}\
                    {eq{$domain}{bar}}\
                 }}
   route_list  = * "the.mx.server"

Hopefully that should give you a basis to work from.

Mike

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