5.7.1 Unable to relay Exchange 2003

Hi Experts
Recently I added a second domain to be looked after our Exchange 2003 Server.

1st Domain abc.com
2nd Domain xyz.com

I have configured MX records to point to the Exchange Server.  And I have even placed a recipient policy for xyz.com in Exchange Server and checked that the server is responsible for all mail delivery to this address.  

However when I go to send an email to that address postmaster@xyz.com I get the error message:

Final-Recipient: rfc822;postmaster@xyz.com
Action: failed
Status: 5.7.1
Diagnostic-Code: smtp;550 5.7.1 Unable to relay for postmaster@xyz.com

I can't figure out where I have gone wrong.  Surely the recipients policy entry covers this.

Please help.
Who is Participating?
omfgwtflolbbqConnect With a Mentor Author Commented:
Hi Guys
I actually solved this one myself.  Turns out that my network has a perimeter SMTP server that handles the email first before passing onto Exchange.  I had to add the domain there in IIS.

1) In IIS Expand Default SMTP Server
2) Right Click Domains
3) Select New -> Select Domain
4) Specify Remote domain Type Click Next
5) Enter the name of the domain click finish

And that fixed my problem

Britt ThompsonConnect With a Mentor Sr. Systems EngineerCommented:
Do the users you're trying to send to have the email address in their list of email addresses in their Exchange Settings in Active Directory?
Rajith EnchiparambilConnect With a Mentor Office 365 & Exchange ArchitectCommented:
Create a test user and give xyz.com as email address and send a test email. Post the bounced message you have.

It will be good to restart the info store service so that exchange is aware of the new domain.
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