> Uh no !
> 
> let's refer to http://i47.tinypic.com/oi574w.jpg (I created 
> it by loading the original scheme I sent to Fritz time ago 
> and "tailoring" it for this particular case :D)
> 
> Now, let's say the public IP is 123.45.67.89 and that's the 
> IP on which ASSP is listening (on port 25 btw)
> 
> The posfix server is instead listening on 10.100.100.11:25 
> and is configured so that the local domains emails will be 
> forwarded to
> 192.168.1.1:25 which is the Exchange server sitting on the LAN
> 
> so, incoming email will hit 123.45.67.89:25 where ASSP is 
> listening, ASSP will check incoming emails destination 
> addresses (either using LDAP or VRFY/RCPT) against 
> 192.168.1.1 and will proxy (smtpdest) such emails  to 
> 10.100.100.11.:25 where postfix is listening
> 
> Good incoming emails will then be received by postfix which, 
> due to config will route them to 192.168.1.1:25 that is the 
> LAN Exchange srv
> 
> Outgoing emails from LAN will be sent by users to the 
> exchange srv the latter will then send them to 
> 10.100.100.10:25 that is, the ASSP relayport
> 
> ASSP will proxy such connections to 10.100.100.11:25 (posfix 
> again) which will then proceed routing the emails toward the 
> destination MX
> 
> need more :) ?

Your pic is fine other than what Fritz mentioned.  I was just saying
that Andreas is not using that method, but rather a LAN method which is
quite similar to your DMZ one.

Brett


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