Was: Email server+network architecture

[dataclaus1 () hushmail com]

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To all who have replied:

Thank you for your suggestions.

For those who were wondering, we have not yet decided on a platform for the servers.  We are a small financial 
institution and are awaiting some input from FDIC about open source solutions Re:  audit.  Anyone with knowledge of 
this is welcome to write me off-list (as it seems slightly off-topic).


I'm still not sure which way will best meet our policy (and I'm not saying it's a particularly good or bad one, just 
that it's there) requirements.  It seems the best way really involves two servers given the restrictions.  Lobbying for 
that change in policy may be a better option yet--put the ball back in their court, then the burden of timeline rests 
with them.

Thanks again!

<snip>
Situation: My company is very restrictive on internet and email use. Only select users are allowed external use, and 
fewer still have unrestricted net access. Communications (email) with 'customer data' are not permitted outside the 
corporate perimter, including the DMZ. We do not wish to have all of our users able to pop3/smtp outside our corporate 
perimeter, even to the DMZ. We want an email schema as listed below:

Inside<->Inside: all users
Inside<->Outside: Only those designated by management
<snip>
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