> Actually,  not  to  dispute  Sandy,  but you _can_ do peering to the
> exchange server since version 8.11 which will let you split the user
> base across both servers

I noted that he wasn't running a late enough version for that. :)

However,  even on 8.1x, peering is really a suboptimal solution, as it
leaves  you  open to dictionary attacks if the MX is a peer server (as
opposed to being a dedicated MX accepting only for valid addresses).

And  IMail-to-Exchange  is _still_ only half the problem. For Exchange
to  be part of a peer group, you still absolutely, positively needs to
set  recipient  policies  accordingly. Getting Exchange to accept mail
for [EMAIL PROTECTED] is just another recipient policy. The
intra-domain  routing  needs  to work in both directions, precluding a
"vanilla" Exchange installation.

--Sandy


------------------------------------
Sanford Whiteman, Chief Technologist
Broadleaf Systems, a division of
Cypress Integrated Systems, Inc.
e-mail: [EMAIL PROTECTED]

SpamAssassin plugs into Declude!
  http://www.mailmage.com/products/software/freeutils/SPAMC32/download/release/

Defuse Dictionary Attacks: Turn Exchange or IMail mailboxes into IMail Aliases!
  
http://www.mailmage.com/products/software/freeutils/exchange2aliases/download/release/
  http://www.mailmage.com/products/software/freeutils/ldap2aliases/download/release/


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