Single mail domain receiving mail for 2 windows domains - Microsoft Exchange

Here's an article on how to share domain names:

321721 XCON: Sharing SMTP Address Spaces in Exchange 2000 Server and
Exchange
http://support.microsoft.com/?id=321721

Thanks,
Fitz Crittle

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"christianm" <christian.martin@iog.co.uk> wrote in message
news:8495687b.0501200748.60552852@posting.google.com...
> My company (A) has recently taken over another company (B) we are to
> have a new email address for the whole group (@ab.com). I would like
> to know if it is possible to have mail delivered to both companys,
> each operate seperate network domains but with trust between them.
>
> Currently the mx record for ab.com points to A's exchange and I set a
> connector with B's exchange ip address as the smart host for mail with
> ab.com.
>
> Mail delivered to a user on A's exchange has no problem, Mail
> delivered to a user on B's exchange returns the error.
>
> 'joe.blogss@ab.com' on 20/01/2005 14:22
> There was a SMTP communication problem with the
> recipient's email server. Please contact your system administrator.
> <mail.a.com #5.5.0 smtp;554 SPAM-Relay detected>
>
> Any advice on what I may be doing wrong, or if I've gone about this
> the wrong way would be apprecieted. Both domains are using excange
> 2000 and I wish this to be in place for a couple of months before we
> do a windows domain merge
>
> regards
>
> Christian