Renaming NETBIOS/TCP IP HOST on Exchange Server

Help.

I have a server with the NETBIOS and TCP/IP Host name of nature_dc. It's
directory name is nature-dc.

When talking to some email servers it will return the following error:
        
        HELO nature_dc.naturedc.com
        501 syntactically invalid HELO argument(s)

Can I just change the NETBIOS and/or the TCP/IP host name to solve this
problem?

Will I need to make any other changes to get this to work cleanly?
(client's..DNS...etc...)

Thanks for your help in this matter.


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