Hi Andrew,
Exchange 2003 SMTP Namespace Sharing
http://www.msexchange.org/tutorials/...e-Sharing.html
How to share an SMTP address space in Exchange 2000 Server or in Exchange
Server 2003
http://support.microsoft.com/kb/321721
The key element here is to clear the " This Exchange Organization is
responsible for all mail delivery to this address" check box in the SMTP
Address Properties dialog box. Then when Exchange doesn't find a local
recipient for the mail message, that message is sent to the 'external
hosting' mail server.
--
Merv Porter [SBS-MVP]
============================
"Andrew" <> wrote in message
news:d804e41d-8f10-4eb9-b237-...
> I'm using SBS 2003 and our internet mail is hosted externally. All
> our users have Exchange mailboxes except one. That one user still has
> an email address using the same corporate domain but he just uses the
> webmail at the host's site.
>
> The problem is when someone tries to email him from within our LAN
> (using the Exchange SMTP server) then Exchange bounces it with 550 -
> relaying not allowed. Any suggestions on how to fix this?
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