running SBS 4.5 Exchange 5.5 adding a new domain to receive mail for

[Lexicon]

I believe that I have performed all steps necessary to add the ability to
receive mail for a new Domain name.

I currently have a mail server accepting mail for cen-elec.com, but we have
added another domain name with a recent name change. I have added all of
the DNS entries, or what I believe to be the correct entries. I have added
email addresses under the receipients in exchange. My zone information is
going through the internet as we speak and should be up and running.
Everytime I send mail to my new domain globalwiretechnologies.com I get the
following rejection from my hotmail test account:
did not reach the following recipient(s):

lex...@globalwiretechnologies.com on Wed, 12 Sep 2001 16:07:37 -0500
Unable to deliver the message due to a communications failure
The MTS-ID of the original message is: c=us;a=
;p=central;l=CENTRAL010109122107SZHP1HAP
MSEXCH:IMS:CENTRAL:CENTRAL01:CENTRAL01 3902 (000B09AA) Host Unknown

I believe that this error is telling me that the mail reached my server
here, but is being rejected. I have missed a step somewhere I believe.
Thank you.