Quick way to relay mail

I have the following scenario. Suse 7.0 mail server which is working perfectly. I also have several development servers that mount the mail spool of the mail server. When developers send mail from a development server with an NFS mounted mail spool, the mail appears as somebody@some.domain.com, instead of somebody@domain.com. All mail should always be delivered to the Suse box, and never to any other server even though it may originate there. How do I solve this problem? I would like for sendmail on every development server to simply forward everything to the Suse mail server. Thanks, CC