> Is there a way to tell the IMail server to re-direct to the Exchange
> server if the address does not exist on itself much like the way the
> Exchange box does?

Yes, there is.

You  use  IMail's  peering feature to make the Exchange box a peer. In
addition to adding the peer setting on the IMail box (per the manual),
this  entails  adding  the text "X1" to the Exchange Server's SMTP 220
banner and enabling its VRFY feature.

There are more notes on this in the archives. It's one-time-only setup
and  fully-automated  from  that  point on; no cross-server updates or
additional products/servers necessary.

On  another  note,  I  am not aware of any actual reasons to segregate
Exchange  from the Internet, other than the usual DoS precautions that
would  cover  any  mailbox  server  (including  IMail,  of course) and
ambient  paranoia  about  Microsoft  products  (which  also  is  often
extended to the whole Win32 platform).

-Sandy

P.S.  An  automatic  IMail-->Exchange address rewriting scheme is also
available  for  such  situations,  though peering should be your first
line of attack.


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


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