Exchange 2003 two domains for email

I have one domain A record mail pointing to my ip address and mx record I want a second domain to point to the same server. I have a A record mail and a mx record that has  The mail manager has both domains and internally it's working fine. Externally I get an rejection email that says. (ip address) does not like recipient.
Remote host said: 550 No such domain at this location (
Giving up on (ipaddress) I have Sonic firewall pointing to a Barracuda Spam device then the exchange server.
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Tony MassaCommented:
The Barracuda device has to allow the new domain.

You also have to configure a new recipient policy (or change the default) to accept the same mail.

Then you have to add new proxyAddresses to AD users/groups/pub Folders.
Sikhumbuzo NtsadaSenior IT TechnicianCommented:
If you host your own e-mail then login to service provider like "godaddy" then add the new domain as accepted domain.
earl_ITAuthor Commented:
Thanks, I forgot to add the domain to the Barracuda. Once I did that everything worked. Thanks for reminded me of that!
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